PD2 Light by Thomas E Clark https://padlet.com/tec430/g3smayddi2oc (1) What are electromagnetic waves? (2) List the wave speed equation and the variables? (3) What is the speed of sound and the speed of light? (4) What is luminous flux and the units? (5) What is reflection and what is the difference between diffuse and specular reflection? (5) Display a diagram showing the angle of incidence and angle of reflection. (6) What is the difference between a virtual image and a real image? (7) What the difference between a concave and convex lens ( show shape) (7) What is a the mirror equation ( identify variables) (8) What is the equation for Magnification ( id variables) (9) What are the primary colors? (10) Explain how polarization of light occurs in sun glasses ( how does it block the light out)? en-us 2018-03-20 15:40:49 UTC 2025-11-17 17:18:52 UTC hello@padlet.com Paj Thao https://padlet.com/tec430/g3smayddi2oc/wish/244660860 (1) An electromagnetic wave is a wave produced by the acceleration of an electric charge and propagated by the periodic variation of intensities of, usually, perpendicular electric and magnetic fields. There are seven types on the spectrum: radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

(2) The wave equation is v = f*λ where v is speed in m/s, f is wavelength in m, and λ is frequency in Hz.

(3) The speed of sound is the distance traveled per unit time by a sound wave as it propagates through an elastic medium. It is 343 m/s in dry air at 20 °C.
The speed of light is the distance light can travel in a unit of time through a given substance. In a vacuum (like space), it is 300000 km/s.

(4) Luminous flux is the quantity of the energy of the light emitted per second in all directions. The unit of luminous flux is the lumen (lm). One lumen is the luminous flux of the uniform point light source that has luminous intensity of 1 candela and is contained in one unit of spatial angle (or 1 steradian).

(5) See below.

(6) A virtual image is an optical image formed from the apparent divergence of light rays from a point, as opposed to a real image, an imaged form from the rays' actual divergence.

(7) A convex lens, or converging lens, is thicker at the center than at the edges. Rays of light that pass through the lens converge at a point called the principal focus. The distance between the principle focus and the center of the lens is called the focal length.
It is () shaped, for lack of image.
A concave lens, or diverging lens, is thinner at the center than at the edges. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus. The image is virtual and diminished.
It is )( shaped, for lack of image.

(7) The mirror equation is (1/f) = (1/do) + (1/di), where f is the focal length, do is the object distance, and di is the image distance.

(8) The magnification equation is m =(hi / ho) = -(di / do), where m is magnification, hi is the image height,  ho is the object height, di is the image distance, and do is the object distance.

(9) The primary colors of light are red, green, and blue, not to be confused with the primary colors of pigment, cyan, magenta, and yellow, or the artist color wheel's red, blue, and yellow model that predates modern science.

(10) A light wave that is vibrating in more than one plane is called unpolarized light. In comparison, polarized light waves are light waves in which the vibrations occur in a single plane. An unpolarized light wave can become polarized through polarization. Sunglasses polarize light waves through transmission. They are made of a material that is capable of blocking one of the two planes of vibration, so it can filter out one half the intensity. The general rule is that the electromagnetic vibrations that are in a direction parallel to the alignment of the molecules are absorbed.
]]> 2018-03-21 17:37:09 UTC https://padlet.com/tec430/g3smayddi2oc/wish/244660860 Enrick David https://padlet.com/tec430/g3smayddi2oc/wish/244665978 1.) An electromagnetic wave is one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
2.) Wave Speed = Frequency x Wavelength. v = f x λ, v is speed in m/s, f is the wavelength in m, and λ is the frequency in Hz.
3.) The speed of sound is a physical constant for any given medium at a specific pressure and temperature. The speed of sound is approximately 331.4 meters per second.
 The speed of light is the distance light can travel in a unit of time through a given substance. Light travels through a vacuum at about 186,000 miles or 300,000 kilometers per second.
4.) Luminous flux is the quantity of the energy of the light emitted per second in all directions. The unit of luminous flux is lumen (lm). One lumen is the luminous flux of the uniform point light source that has luminous intensity of 1 candela and is contained in one unit of spatial angle (or 1 steradian).
5.) The reflection of light can be roughly categorized into two types of reflection: specular reflection is defined as light reflected from a smooth surface at a definite angle, and diffuse reflection, which is produced by rough surfaces that tend to reflect light in all directions. (See picture below).
6.) A real image is the image formed where the light rays are focussed. A virtual image is one from which the light rays appear to come but don't actually come from that image like in a mirror.
7.) A concave lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus. Convex lenses are thicker at the middle. Rays of light that pass through the lens are brought closer together.
The mirror equation is (1/f) = (1/ DO) + (1/DI), where F is the focal length, DO is the object distance, and DI is the image distance.
8.) The Magnification Equation is M = (HI/HO) = -(DI/DO), where M is the magnification, HI is the image's height, HO is the object's height, DI is the image's distance, and DO is the object's distance.
9.) The primary colors are red, blue and green with the complementary colors or secondary colors of cyan, yellow and magenta. 
10.) Polarization is the property of certain electromagnetic radiations in which the direction and magnitude of the vibrating electric field are related in a specified way. Polarized sunglasses provide superior glare protection — especially on the water. Polarized lenses contain a special filter that blocks this type of intense reflected light, reducing glare.]]> 2018-03-21 17:43:19 UTC https://padlet.com/tec430/g3smayddi2oc/wish/244665978 Vivek Mynam https://padlet.com/tec430/g3smayddi2oc/wish/244823640 1) Electromagnetic waves are propagated by periodic intensities and these include radio waves, microwaves, infrared waved, visible light, ultraviolet rays, x-rays, and gamma rays.
2) The wave speed equation is V=F*λ and the variables are as follows: V is speed in m/s, F is the wavelength in m, and λ is frequency in Hz.
3)The speed of sound is the distance a sound wave travels in a unit of time and it is 343 m/s and the speed of light is the distance light can travel in a unit of time and it is 300000 km/s.
4) Luminous flux is the measure of the perceived power of light. The unit of luminous flux is the lumen (lm).
5)
6) A virtual image is an optical image that is formed from the divergence of light rays. A real images formed from the rays' actual divergence.
7) A concave lens is a diverging lens and is thin at the middle so that rays of light that pass through the lens are spread out and they diverge. When parallel rays of light pass through a concave lens, the refracted rays diverge and appear from the principal focus. A convex lens is a converging lens and is thicker in the middle so that rays of light that pass through the lens are brought closer together and they converge. When parallel rays of light pass through a convex lens the refracted rays converge at the principal focus. The focal length is the distance between the principal focus and the centre of the lens.

7) The mirror equation is (1/F) = (1/DO) + (1/DI) and the variables are as follows: F is the focal length, DO is the object's distance, and DI is the image's distance.
8) The magnification equation is M =(HI/HO) = -(DI/DO) and the variables are as follows: M is the magnification, HI is the image's height, HO is the object height, DI is the image's distance, and DO is the object's distance.
9) The primary colors are magenta, yellow, and cyan which can be simplified to red, yellow, and blue.
10) Polarization of light occurs in sunglasses with the use of a Polaroid Filter. Polaroid filters block one of the two planes of vibration of an electromagnetic
wave and when unpolarized light emerges for a polaroid filter, it emerges with half the intensity and with the vibrations on a single plane hence making it polarized light.
]]> 2018-03-22 02:52:52 UTC https://padlet.com/tec430/g3smayddi2oc/wish/244823640 Hailey Finnecy tlakshminarayanan https://padlet.com/tec430/g3smayddi2oc/wish/245064007 1. Electromagnetic waves: the result of vibrations between an electric field and a magetic field.
2.  V =F*λ
Speed = Wavelength * Frequency
3. Speed of Sound: 343 m/s
Speed of Light: 299,792,458 m/s
4. Luminous Flux: measurement of the perceived power of light. lm.
5. Reflection: Change of direction of a wavefront at an interference of two media so that the light returns to the media it originated from.
Diffuse is when the reflection of light bounces off at multiple directions while spectral reflection is when it bounces off in one direction.
6. A real image is where the light is while a virtual image is formed by diverging lenses or by placing an object inside the focal length of a converging lense.
7. A concave lense spreads out light while a convex lense focuses light.
di = do f / (do - f)
di = image distance
do = obect distance
f = focal length
8. M = hi/ho = -di/do
M = Magnification
hi = image height
ho = object height
9. Primary colors: A group of colors which can form other colors by mixing. Blue red and yellow.
10. Polarization is the restriction of a vibration of a transverse wave to one direction. Sun glasses contain a filter which restricts the passage of intense light which reduces the glare on them.]]> 2018-03-22 15:36:08 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245064007 Isabella Wilkinson https://padlet.com/tec430/g3smayddi2oc/wish/245079526
  • Electromagnetic waves are created by the vibration of an electric charge and can travel through the vacuum of outer space.
  • The wave equation is v = f*λ where v is speed in m/s, f is wavelength in m, and λ is frequency in Hz.
  • The speed of sound is the distance traveled per unit time by a sound wave as it propagates through an elastic medium. It is 343 m/s in dry air at 20 °C. The speed of light is the distance light can travel in a unit of time through a given medium. In a vacuum (like space), it is 300000 km/s.
  • Luminous flux is the quantity of the energy of the light emitted per second in all directions. The unit of luminous flux is lumen (lm). 
  •  See below.
  • A real image is the image formed where the light rays are focussed. A virtual image is one forms when the light rays appear to come but don't actually come from that image like in a mirror.
  • A concave lens is a diverging lens. When parallel rays of light pass through a concave lens, the refracted rays diverge so that they appear to come from one point called the principal focus. Convex lenses are thicker at the middle. Rays of light that pass through the lens are brought closer together. 
  • The mirror equation is (1/f) = (1/ DO) + (1/DI), where F is the focal length, DO is the object distance, and DI is the image distance.
  • The Magnification Equation is M = (HI/HO) = -(DI/DO), where M is the magnification, HI is the image's height, HO is the object's height, DI is the image distance, and DO is the object's distance.
  • The primary colors are red, blue and green with the complementary colors or secondary colors of cyan, yellow and magenta. 
  •  Polarization is the property of certain electromagnetic radiations in which the direction and magnitude of the vibrating electric field are related in a specified way. Polarized sunglasses provide superior glare protection — especially on the water. Polarized lenses contain a special filter that blocks this type of intense reflected light, reducing glare.

    • ]]>     2018-03-22 15:58:02 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245079526     Shreyash Patel and Cameron Grubb https://padlet.com/tec430/g3smayddi2oc/wish/245079641  
    1.) An electromagnetic wave is one of the waves that are created by variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
    2.) Wave Speed = Frequency x Wavelength. v = f x λ, v is speed in m/s, f is the wavelength in m, and λ is the frequency in Hz.
    3.) The speed of sound is a physical constant for any medium at a specific pressure and temperature. The speed of sound is 331.4 meters per second. The speed of light is the distance light can travel in a unit of time through a given substance. Light travels through a vacuum at about 300,000 kilometers per second.
    4.) Luminous flux is the quantity of the energy of the light emitted per second in all directions. The unit of luminous flux is lumen (lm). One lumen is the luminous flux of the uniform point light source that has luminous intensity of 1 candela and is contained in one unit of a spatial angle (or 1 steradian).
    5.) The reflection of light can be  categorized into two types of reflection: specular reflection, defined as light reflected from a smooth surface at a definite angle, and diffuse reflection, produced by rough surfaces that tend to reflect light in all directions.(attached)
    6.) A real image is the image formed where the light rays are focussed. A virtual image is one from which the light rays appear to be focused but don't actually come from that image like in a mirror.
    7.) A concave lens is a diverging lens. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus. Convex lenses are thicker at the middle. Rays of light that pass through the lens are brought closer together.
    The mirror equation is (1/f) = (1/ DO) + (1/DI), where F is the focal length, DO is the object distance, and DI is the image distance.
    8.) The Magnification Equation is M = (HI/HO) = -(DI/DO), where M is the magnification, HI is the image's height, HO is the object's height, DI is the image's distance, and DO is the object's distance.
    9.) The primary colors are red, blue and green with the complementary colors or secondary colors of cyan, yellow and magenta. 
    10.) Polarization is the property of certain electromagnetic radiations in which the direction and magnitude of the vibrating electric field are related in a specified way. Polarized sunglasses provide superior glare protection — especially on the water. Polarized lenses contain a special filter that blocks this type of intense reflected light, reducing glare.

     
    ]]>     2018-03-22 15:58:15 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245079641     Harry Haessner & Olivia Foreman https://padlet.com/tec430/g3smayddi2oc/wish/245085002 1. Electromagnetic radiation refers to the waves of the electromagnetic field, propagating through space-time, carrying electromagnetic radiant energy.

    2. wave speed (metre per second) = frequency (hertz) × wavelength (metre)

    3.  speed of sound in dry air at 20 °C + the speed of light =
    299 792 801 m / s

    4.The SI unit of luminous flux is the lumen (lm). One lumen is defined as the luminous flux of light produced by a light source that emits one candela of luminous intensity over a solid angle of one steradian. In other systems of units, luminous flux may have units of power.

    5. The reflection of light can be roughly categorized into two types of reflection: specular reflection is defined as light reflected from a smooth surface at a definite angle, and diffuse reflection, which is produced by rough surfaces that tend to reflect light in all directions

    6. A real image is formed when light rays originating from a point on one side of a lens 
    A virtual image is formed when light rays originating from a point on one side of a lens

    7. The convex and concave lense differences are facing inward and outward.

    8. Image height / magnification * object height.

    9.Red yellow Blue

    10. Light usually scatters in all directions; but when it's reflected from flat surfaces, it tends to become polarized — meaning it travels in a more uniform (usually horizontal) direction.]]>     2018-03-22 16:06:04 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245085002     Annie Tong, Andrea AhSue, Emily Hung, Lawrence Nguyen https://padlet.com/tec430/g3smayddi2oc/wish/245086259
  • Electromagnetic are waves in the electromagnetic field that carry electromagnetic radiant energy.
  • Wave speed (metre per second) = frequency (hertz) × wavelength (metre)
  • The speed of sound in dry air is approximately 323 m/s, and the speed of light is 299,792,458 m/s.
  • Luminous flux is the quantity of the energy of the light emitted per second in all directions. The units for luminous flux is lumen (lm). One lumen is the luminous flux of the uniform point light source that has luminous intensity of 1 candela and is contained in one unit of spatial angle. 
  • The reflection of light can be roughly categorized into 2 types of reflection: specular reflection and diffuse reflection. Specular reflection is the light reflected from a smooth surface at a definite angle. Diffuse reflection is produced by rough surfaces that tend to reflect light in all directions. 
  • There are many differences between a real image and a virtual image. For example a real image can be caught on a screen whereas a virtual image cannot be caught on a screen. A real image is formed when light rays originating from a point on one side of a lens are refracted by the lens so that they focus to a point on the other side of the lens at the image location.
  • The difference between a concave and convex is that one curves inwards while the other outwards.
    9.
    10.
    • 11.  Yellow, Red, and Blue
    12. The certain material in sunglasses can absorb light in all directions and lowers the intensity of the transmitted light by ½. The intensity of the light decreases due to Malus’s law. 

    ]]>     2018-03-22 16:07:57 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245086259     Scott Nguyen https://padlet.com/tec430/g3smayddi2oc/wish/245854668 1. Electromagnetic waves are waves  that carry electromagnetic radiant energy.
    2. Wave Speed(meter per second)= Frequency (hertz) * wavelength (meter)
    3. The speed of sound is 323 m/s and the speed of light is 299,792,458 m/s  
    4.The SI unit for luminos flux is lumnen (lm). One lumnen is defined as the luminos flux of light produced by a source that emits one candela of luminos intensity over a solid angle of one steradain. In other systems of units, the luminos flux may have units of power.
    5.The reflection of light can be roughly categorized into two types of reflection: specular reflection is defined as light reflected from a smooth surface at a definite angle, and diffuse reflection, which is produced by rough surfaces that tend to reflect light in all directions. See attachment to your right.
    6. A real image is formed when light rays originating from a point on one side of a lens 
    A virtual image is formed when light rays originating from a point on one side of a lens.
    7. The convex and concave lens differences are facing inward and outward and the design of the lenses that affect how light reflects when it gets to the lenses.
    8. Magnification= Image height / magnification * object height.
    9. Red yellow blue
    10. ]]>     2018-03-25 17:34:55 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245854668     https://padlet.com/tec430/g3smayddi2oc/wish/245856382 2018-03-25 17:49:05 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245856382 https://padlet.com/tec430/g3smayddi2oc/wish/245856445 2018-03-25 17:49:33 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245856445 https://padlet.com/tec430/g3smayddi2oc/wish/245856464 2018-03-25 17:49:44 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245856464 Carlo Barrera, Henry Blackwell, and Caleb Frahm https://padlet.com/tec430/g3smayddi2oc/wish/245899987 1. Electromagnetic waves carry electromagnetic radiant energy and can travel through space . 
    2. v=f*y
    v=wave speed
    f=frequency
    y=wavelength
    3. Speed of sound is 343 m/s
    and the speed of light is 299, 792, and 458 m/s. 
    4. Luminous flux is the measure of the of the perceived power of light.  The units are lumen or lm.
    5. Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Diffuse reflection is the reflection of light on a surface that leads to the ray scattered at many angles. Specular reflection is mirror like reflection of waves. 
    6. See at the bottom. 
    7. A real image occurs where rays converge, and a virtual image appears when the rays seem to converge. 
    8. See image at bottom. A convex lens bends light inward so the object appears larger and closer. A concave lens is thicker in the middle thus spreading out the light so the image appears as smaller. 
    9. 1/do +1/di= 1/f
    do=distance from mirror to object.
    di= distance from the mirror to the image.
    f=focal length
    10.  m=hi/ho
    hi- height of image 
    ho- height of object. 
    11. Red, blue, and yellow.
    12. Sunglasses have a filter that reduces light, which restricts the vibration of a transverse wave to one direction. 


    ]]>     2018-03-25 23:30:32 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245899987     https://padlet.com/tec430/g3smayddi2oc/wish/245902166 2018-03-25 23:49:51 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245902166 https://padlet.com/tec430/g3smayddi2oc/wish/245902194 2018-03-25 23:50:02 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245902194 https://padlet.com/tec430/g3smayddi2oc/wish/245904102 2018-03-26 00:09:27 UTC https://padlet.com/tec430/g3smayddi2oc/wish/245904102 Kimmy Tran and Jorge Perez https://padlet.com/tec430/g3smayddi2oc/wish/246549146
  • Electromagnetic waves are created as a result of vibrations between an electric field and a magnetic field. 
  • v = f. λ ; λ = wavelength (m) ; f = frequency of wave (Hz) ; v = speed of wave (m/s)
  • The speed of sound is the speed of transmission of a small disturbance through a medium. The speed of sound in room temperature air is 346 meters per second. The speed of light is 299,792,458 meters per second. 
  • Luminous flux is the measure of the perceived light. The SI unit of luminous flux is the lumen (lm).
  • Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. This change can be categorized into two different types of reflection: diffuse reflection and specular reflection. Diffuse reflection is produced by rough surfaces that reflects light in all directions. Specular reflection is when light is reflected by a smooth surface at a specific angle. 
  • Reference image. 
  • A real image is formed where rays of light and refraction actually meet at a certain point, where as a virtual image where rays of light and refraction appear to meet at a certain point.
  • Concave lenses are thinner in the middle, meaning when a ray of light passes through them they spread out. Convex lens bend rays of light inward which makes the object look closer than it actually is.
  • (1/d0)+(1/dI)=1/F ; d0=the distance between the mirror and the object ; dI=the distance between the mirror and the image ; F=focal length
  •  m=h1/h0=-d1/d0 ; d0=the distance between the mirror and the object ; dI=the distance between the mirror and the image ; h1=height of the image ; h0=height of the object
  • Green, blue, and red
  • The glare that causes people to wear sunglasses comes from horizontal surfaces that reflect light waves. The reflected waves are polarized to match the angle of the horizontal surface. Polarized sunglasses are fixed at an angle that allows vertically polarized light to pass through. 


    • ]]>     2018-03-27 15:26:47 UTC https://padlet.com/tec430/g3smayddi2oc/wish/246549146     https://padlet.com/tec430/g3smayddi2oc/wish/246564058 2018-03-27 15:55:00 UTC https://padlet.com/tec430/g3smayddi2oc/wish/246564058 Zoe Marley https://padlet.com/tec430/g3smayddi2oc/wish/246584896 (1) Electromagnetic waves are waves that are created as a result of vibrations between an electric field and a magnetic field.
    (2) v = f*λ, λ = wavelength (m), f = frequency of wave (Hz), v = speed of wave (m/s)]]>     2018-03-27 16:36:37 UTC https://padlet.com/tec430/g3smayddi2oc/wish/246584896     Tyler Jacobsen, Juli Rendler, Joshua Cheah https://padlet.com/tec430/g3smayddi2oc/wish/247133277 1) Electromagnetic waves are waves that are generated by vibrations between a magnetic field and an electrical field.
    2) v = f*λ, aka wave speed = frequency * wavelength
    3) Speed of sound = 343 m / s, speed of light = 299 792 458 m / s
    4) Luminous flux is the measure of perceived power of light, measured in lumens (lm).
    5) Attached at bottom.
    6) A real image is where the light rays are focused. A virtual image is where the light appears to come from, but really doesn't (like in a mirror).
    7) Concave lens is narrower in the center of the lens, convex is narrower at the edges of the lens.
    7) The mirror equation is as follows: (object distance = do, image distance = di, focal length = f)
    8) The magnification equation is as follows: (image height = hi, object height = ho, object distance = do, image distance = di)
    9) The primary colors are red, green, and blue, from which all other colors of light are derived.

    10) Light usually disperses, but when it is reflected off of a flat surface, it can come off in a more direct, horizontal path, which can be very bright and distracting, even dangerous. Polarized lenses work to block these dangerous rays.
    ]]>     2018-03-29 03:41:54 UTC https://padlet.com/tec430/g3smayddi2oc/wish/247133277     Zoe Marley pt 2 https://padlet.com/tec430/g3smayddi2oc/wish/247291874 (3) The speed of sound is 343 m/s. The speed of light is 299,792,458 m/s.
    (4) Luminous flux is the measure of percieved power of light, measured in lumens (lm).
    (5)
    (6) A virtual image is where light appears to come from but really does not, while a real image is where the light rays are focused. 
    (7) A concave lens is thinner in the middle and spreads light waves out, while a convex lens is thicker in the middle and brings light waes together. 
    (7) 1/f = 1/Do + 1/Di. F is focal length. Do is object distance. Di is image distance.
    (8) Magnification = image height/ object height.
    (9) The primary colors are red, green, and blue.
    (10) Light usually scatters in all directions; but when it's reflected from flat surfaces, it tends to become polarized — meaning it travels in a more uniform (usually horizontal) direction. This creates an annoying and sometimes dangerous intensity of reflected light that causes glare and reduces visibility. Polarized lenses contain a special filter that blocks this type of intense reflected light, reducing glare.]]>     2018-03-29 15:23:08 UTC https://padlet.com/tec430/g3smayddi2oc/wish/247291874     https://padlet.com/tec430/g3smayddi2oc/wish/247297844 2018-03-29 15:35:58 UTC https://padlet.com/tec430/g3smayddi2oc/wish/247297844 Joshua Villarin & Jacalyn https://padlet.com/tec430/g3smayddi2oc/wish/247304990 1. Electromagnetic waves are waves that are a realist of vibrations between an electric field and a magnetic field.
    2. v = f*λ, λ = wavelength (m), f = frequency of wave (Hz), v = speed of wave (m/s)
    3. speed of sound:  331.2 metres per second. speed of light 300000000 meters per second
    4. Luminous flux is the measure of the power of light. It is measured is lumens (lm).
    5. AT BOTTOM
    6. Reflection is the throwing back by a body or surface of light, heat, or sound without absorbing it. Specular reflection is light reflected from a smooth surface at a definite angle. Diffuse reflection, is produced by rough surfaces that tend to reflect light in all directions.
    7. AT BOTTOM, The mirror equation is as follows: (object distance = do, image distance = di, focal length = f)
    8. The equation for magnification is to take the power of the objective (4X, 10X, 40x) and multiply by the power of the eyepiece, usually 10X.
    9. Primary pigment colors are red, blue, yellow, but primary light colors are red, green, and blue.
    10. It occurs when some of the light is reflected off of the sunglasses. Therefore the black color of the sunglasses reflects white light because some of the white light that is absorbed by the dark shades of the sunglasses is then reflected. This creates the white polarization. It specifically is caused by the diffraction of light, which orients light waves in a certain way so that it can be reflected.]]>     2018-03-29 15:53:35 UTC https://padlet.com/tec430/g3smayddi2oc/wish/247304990     Alana Balagso https://padlet.com/tec430/g3smayddi2oc/wish/247312678
  • Electromagnetic waves are created as a result of vibrations between an electric field and a magnetic field. 
  • v = f. λ ; λ = wavelength (m) ; f = frequency of wave (Hz) ; v = speed of wave (m/s)
  •  The speed of sound is 323 m/s and the speed of light is 299,792,458 m/s  
  • The SI unit for luminos flux is lumnen (lm) and it is the measure of perceived light.
  •  The reflection of light can be  categorized into two types of reflection: specular reflection (defined as light reflected from a smooth surface at a definite angle) and diffuse reflection (produced by rough surfaces that tend to reflect light in all directions).
  •  A real image is formed when light rays originating from a point on one side of a lens 
    A virtual image is formed when light rays originating from a point on one side of a lens.
  •  The convex and concave lens differences are facing inward and outward and the design of the lenses that affect how light reflects when it gets to the lenses.
  •  The magnification equation is as follows: (image height = hi, object height = ho, object distance = do, image distance = di)
  •  The primary colors are red, green, and blue, from which all other colors of light are derived.
  •  Polarization is the restriction of a vibration of a transverse wave to one direction. Sun glasses contain a filter which restricts the passage of intense light which reduces the glare on them.
    • ]]>     2018-03-29 16:13:12 UTC https://padlet.com/tec430/g3smayddi2oc/wish/247312678