# data[].attributes.body
1) Electromagnetic waves are created by vibrations between electric and magnetic fields.
2) wave speed = frequency x wavelength
3) The speed of sound is 343 m/s and the speed of light is 2.99 E^8 m/s
4) Luminous flux is the measure of the perceived power of light and the unit is the lumen (lm).
5A) Reflection is an abrupt change in the direction of a wave that strikes a boundary between different mediums. Specular reflection is reflection off of smooth surfaces while diffuse reflection is produced by rough surfaces, which causes the light to reflect in different directions.
5B)
6) A virtual image is formed by diverging lenses while a real image is a reproduction of an object via light that can be formed on a real surface.
7A) A concave lens is thinner in the center than at the edges and causes light to diverge. A convex lens is thicker in the center and thinner at the edges, causing light to converge.
7B) 1/f = 1/d0 +1/di
f= focal length
do= object distance
di= image distance
8) M = hi/h0
hi= image height
h0= object height
9) Primary colors are red, blue, and green
10) Polarized sunglasses reflect some electromagnetic waves to minimize how much light reaches the eye.

# data[].attributes.body
1.Electromagnetic waves are waves that are created by vibrations of an electric field.
2. wave speeed= nu (lambada)
-relationship between frequency and wavelength
3. speed of sound is 343m/s and the speed of light is 3E8 m/s
4. It is energy per unit of time that radiated from a source. The units are Lm (lumens)

(5) What is reflection and what is the difference between diffuse and specular reflection?

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

(6) Display a diagram showing the angle of incidence and angle of reflection.

7) What is the difference between a virtual image and a real image?

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.

(8) What the difference between a concave and convex lens ( show shape)

(9) What is a the mirror equation ( identify variables)

object distance (do), the image distance (di), and the focal length (f).

(10) What is the equation for Magnification ( id variables)

image height (hi) and object height (ho)

(11) What are the primary colors?

Blue, Red, Yellow
12

# data[].attributes.body
1.  Electromagnetic waves-  one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity
2. The wave speed=wavelength/period
3. Speed of sound- 299792801 m/s
4. Luminous flux- the quantity of the energy of the light emitted per second in all directions
Unit-Lumen(lm)
5A. Diffuse reflection- produced by rough surfaces that tend to reflect light in all directions
Specular reflection- light reflected from a smooth surface at a definite angle
5B. See pick below
6.  Real Image- 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
Virtual Image- where rays only appear to converge
7A. Convex  shape outward while concave shape inward
7B. Mirror Equation- 1/d0 + 1d1 = 1/f
8. Magnification=  (Image height)/(Magnification*Object Height)
9. Red, Blue, Yellow
10. Polarized light- a light wave that is vibrating in more than one plane

# data[].attributes.body
1. Electromagnetic radiation refers to the waves of the electromagnetic spectrum propagating through space time.
2. speed= wavelength/period where speed is wavelength*frequency
3. The speed of sound is 331.2 meters per seconds. The speed of light is 299,792, 458 m/s.
4. Luminous flux is the perceived power of light. The units are lumen (lm)
5. Reflection is the change in direction of a wavelength, diffuse reflection is when the surface is not smooth so the lights bounce off an object. Diffuse reflection is reflection of light or waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle like in specular reflection.
6. A virtual image is when the outgoing rays from a point always diverge. A real image has to be where the light is which means in front of a mirror or behind a lens.
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. m=hi/ho=-di/do
m= magnification ho = height of object hi= height of image.
9. The primary colors are red, blue and green.
10. Polarized sunglasses reduce glare because the light is blocked and reflected as it travels through the lens.

# data[].attributes.body
1. Electromagnetic waves are waves that are a realist of vibrations between an electric field and a magnetic field.
2. speed= wavelength/period
speed: wavelength*frequency
3. speed of sound: 343 m.s
speed of light: 299,792458 m/s
4. Luminous flux: power of light with units of lumen (lm).
Reflection: Change in direction of a waterfront at an interface between two different types of material

# data[].attributes.body
1)In physics, 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)The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. In dry air at 0 °C, the speed of sound is 331.2 metres per second. The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics, and its exact value is 299,792,458 metres per second.

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

5)

6)A real image is formed when light rays originating from a point on one side of a lens (i.e. the object) are refracted by the lens so that they focus (come together) to a point on the other side of the lens at the image location.

7)A concave mirror converges light to a focal point. For lenses, light converges to a point for a convex lens. A convex mirror diverges light, as does a concave lens.

7)1/f= 1/X+1/Y

f= focal length

X= object distance

Y= image distance

8) m = - hi/ho

m= magnification

ho= size of object

hi= size of image.

9) The primary colors of light are red, green, and blue.

10)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.

# data[].attributes.body
1. Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.
2. speed= wavelength/period where speed is wavelength*frequency
3. Speed of sound is 240 Meters per second Speed of light: 299 792 458 m / s
4. The SI unit of the Luminous FLux is (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.
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
5b.     pls dont vanish thanx
6. A real image is when the light rays are refracted by the lends and refocused. Virtual image is formed when the light rays are refracted so that the diverge and move apart.
7a Convex Lens --> () it refers to the lens which merges with the light rays at a particular point that travels through it, it has an outward curve and the concave lens can be identified as the lens which disperses the light rays around, that hits the lenses --> thats the lens --> )(
7b. 1/f =1/d(o) +1/d(1) f=focal length d(o)= object distance d(i)= image distance
8. M= (a+b) /a  M=Magnification

a= distance from object to source

b= distance from detector to object

9.  the primary colors are red blue yellow
10. Polarized light waves that vibrate in one plane. polarized lens filter out certain types of reflected light

# data[].attributes.body
1. electromagnetic waves are the waves of the electromagnetic spectrum propogating thorugh space-time .
2. c  =  λ ν
c = speed of light

λ = wavelength

ν = frequency
3. speed of sound:  331.2 metres per second
speed of light 300000000 meters per second
4. luminous flux is the perceived power of light. The units are lumen (lm)
5. reflection is the change in direction of a wavelength. diffuse reflection is when the durface is not smooth so the lights bounces eveywhere.Specular reflection is when the surface is smooth so the lights bounced in the same direction.
5. see picture
6. A virtual image is when the outgoing rays from a point always diverge. A real image is when the outgoing rays converge. Flat mirrors produce virtual images.
7. concave lens go inwards convex lens go outwards
7. The mirror equation is 1/f = 1/do  + 1/di
f = focal length
do = object distance
di = image distance
8. m = - hi/ho
m = magnification
hi = size of image
ho = size of object
9. Red green and blue
10.  Sunglasses allow some types of light in and shun others. This reduces glare, so you can see better.

# data[].attributes.body
1. Electromagnetic waves are the waves propogated by simultaneous periodic variations of electrical and magnetic field activity.
2. Wavespeed=frequency (Hz) x wavelength (m)
3. Speed of sound: 343 m/s
Speed of light: 299,792, 458 m/s
4. Luminous flux is the quantity of energy of the light emitted per second in all directions. Unit: lumen.
5. Reflection: light boucing off an object.
Diffuse Reflection is reflection of light or waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle like in specular reflection.
5.  6. A real image has to be where the light is which means in front of a mirror or behind a lens. A virtual image is formed diverging lenses or by placing an object inside the focal length of a converging lens.
7. 7. 1/f=1/X+1/Y
f=focal length
X=object distance
Y=image distance
8. m=hi/ho=-di/do
m=magnification
ho=height of object
hi=height of image.
9. The primary colors are red, blue and green.
10. Polarized sunglasses protect against the harsh light waves.

# data[].attributes.body
1) Electromagnetic waves: waves that are created as a result of vibrations between an electric field and a magnetic field.
2) Speed = Wavelength/Period
Speed = Wavelength * Frequency
v = f • λ
speed (v) of a wave, its wavelength (λ) and frequency (f)
3) speed of sound in dry air at 20 °C = 343 m/s

the speed of light = 299,792,458 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.
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. 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.
5) (see below)
6) A real image is formed when an object is farther from the converging lens than the focal length, so the light rays are refracted to a point on the opposite side of the lens. In contrast, a virtual image is when the object is closer to the lens than the focal length, so the rays diverge to the other side of the lens.
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) Magnification = size of image / size of object
9) The primary colors are blue, green, and red.
10) Polarized sunglasses reduce glare becausd the light is blocked and reflected as it travels through the lens into different directionsrather than directly into the wearer's eyes.