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The science of sound creation, regulation, transmission, reception, and effects, as well as the phenomenon of hearing, is known as Acoustics,while Optics is a branch of physics that studies the behavior and properties of light, as well as how it interacts with matter and how instruments that use or detect it are made. Speaking, listening, and music may fall under the category of Acoustics, while seeing, light, and color may fall under the category of Optics.In a nutshell, acoustics is the study of sound, while optics is the study of light.

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Many people have characterized this as a long line; for example, radio waves and the famous microwave.
Humans are at risk from the Ultraviolet Wave because the sun's strong wave will cause the dreaded sunburn. X-rays, on the other hand, will travel through cell tissue and are used to see the bones in our bodies. Our carry-on bags are also subjected to X-ray inspection by airlines. Since gamma rays may come from space or a nuclear explosion, they are harmful.

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The light we see from the sun is only a fraction of our star's radiation. It comes not only from the sun, but also from the positively charged radiation of the stars in the universe. It travels in waves, with frequency indicating how fast a wave travels per second and wavelength indicating the length of a particular and individual wave in meters.
The higher the frequency, the shorter the wavelength, making it the most dangerous kind. The wavelengths of X-rays range from 0.01 to 10 nanometers. It has short wavelengths and a high frequency that ranges between 10-8 and 10-12 meter.

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🎀  𝒻𝓊𝓃𝒸𝓉𝒾❤𝓃𝓈/ 𝒶𝓅𝓅𝓁𝒾𝒸𝒶𝓉𝒾❤𝓃𝓈  🎀

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🎀  𝒻𝓊𝓃𝒸𝓉𝒾❤𝓃𝓈/ 𝒶𝓅𝓅𝓁𝒾𝒸𝒶𝓉𝒾❤𝓃𝓈  🎀

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🎀  𝓅𝓇🌸𝓅𝑒𝓇𝓉𝒾𝑒𝓈  🎀

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🎀  𝓅𝓇🌸𝓅𝑒𝓇𝓉𝒾𝑒𝓈  🎀

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Lasers are important as it gives us a number of privileges and without it we wouldn't be able to access these certain privileges that can either make work easy or save a life.

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most significant applications of lasers include:

Lasers in medicine- can be used to destroy kidney stones.

Lasers in communications- Laser light is used in optical fiber communications to send information over large distances with low loss.

Lasers in industries- are used to cut glass and quartz.

Lasers in science and technology- are used in computers to retrieve stored information from a Compact Disc (CD).

Lasers in military- Laser range finders are used to determine the distance to an object.

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The process of laser is when the electrons in atoms in special gases, crystals, or gasses absorb energy from an electric current or another laser and become "excited". Laser is an optical device that generates intense beam of coherent monochromatic light by stimulated emission of radiation.

Laser light is different from an ordinary light. It has various unique properties such as coherence, monochromacity, directionality, and high intensity. Because of these unique properties, lasers are used in various applications. Lasers can be used in different ways, for example, laser cutting, laser marking, laser printing etc.

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One of the examples of the benefit of sounds is Sound Therapy. The healing power of sound.

Sound Therapy is a term that refers to a variety of therapies that use sound to treat physical and mental conditions. Since the dawn of time, indigenous societies all over the world have used sound in healing ceremonies, including drumming, hand clapping, singing, dancing, and pulsating.

Sound Therapy techniques vary but all involve the application of sound waves and harmonic vibrations to the body through the use of instruments, including the human voice. Sound helps to facilitate shifts in our brainwave state by using entrainment. Entrainment synchronizes our fluctuating brainwaves by providing a stable frequency which the brainwave can attune to. By using rhythm and frequency, we can entrain our brainwaves and it then becomes possible to down-shift our normal beta state (normal waking consciousness) to alpha (relaxed consciousness), and even reach theta (meditative state) and delta (sleep; where internal healing can occur).

Imagine receiving a gentle bath of sounds allowing your body to let go and move into a deeper state of relaxation.

Sound Therapy is effective in not only achieving a state of relaxation but it also has a way of moving through blockages in the body. Sound Therapy has been known to help treat such conditions as stress, anxiety, high blood pressure, depression, sleep disorders, pain and autism.

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𝓸𝓽𝓱𝓮𝓻 𝓹𝓾𝓻𝓹𝓸𝓼𝓮𝓼 𝓪𝓷𝓭 𝓫𝓮𝓷𝓮𝓯𝓲𝓽𝓼 𝓸𝓯 𝓼𝓸𝓾𝓷𝓭𝓼

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𝓸𝓽𝓱𝓮𝓻 𝓹𝓾𝓻𝓹𝓸𝓼𝓮𝓼 𝓪𝓷𝓭 𝓫𝓮𝓷𝓮𝓯𝓲𝓽𝓼 𝓸𝓯 𝓼𝓸𝓾𝓷𝓭𝓼

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5 main characteristics of sound waves: wavelength, amplitude, frequency, time period, and velocity.

Wavelength -the distance between two corresponding crests or two corresponding troughs of a wave.

Represented by the Greek letter λ (Lambda)

SI Unit: meter (m)

Frequency- tells how frequently an event occurs

is the number of compressions or rarefactions that crosses a particular region per unit time.

denoted by f

SI Unit: hertz (Hz)

Amplitude- the maximum disturbance in the medium on the either side of the mean position gives us the value of the amplitude of the wave.

Depends on the force with which the object is made to vibrate

Is the magnitude of the maximum displacement of each particle from its mean position

Represented by the letter A

SI Unit: meter (m)

Time Period- is the amount of time required to create a complete wave cycle.

Each vibration from the sound source produces a wave’s worth of sound.

Each complete wave cycle begins with a trough and ends at the start of the next trough.

denoted by 'T'

SI Unit: seconds (s)

Velocity- tells us how fast the wave is moving and is expressed as meters per second.

The distance travelled by a wave in one second is called velocity of the wave or speed of the wave.

Represented by the letter v.

SI Unit: meters per second (m/s)

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First, Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. Then, eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes. Next the bones in the middle ear amplify, or increase, the sound vibrations and send them to the cochlea, a snail-shaped structure filled with fluid, in the inner ear. An elastic partition runs from the beginning to the end of the cochlea, splitting it into an upper and lower part. This partition is called the basilar membrane because it serves as the base, or ground floor, on which key hearing structures sit. Once the vibrations cause the fluid inside the cochlea to ripple, a traveling wave forms along the basilar membrane. Hair cells—sensory cells sitting on top of the basilar membrane—ride the wave. Hair cells near the wide end of the snail-shaped cochlea detect higher-pitched sounds, such as an infant crying. Those closer to the center detect lower-pitched sounds, such as a large dog barking. As the hair cells move up and down, microscopic hair-like projections (known as stereocilia) that perch on top of the hair cells bump against an overlying structure and bend. Bending causes pore-like channels, which are at the tips of the stereocilia, to open up. When that happens, chemicals rush into the cells, creating an electrical signal. Lastly, The auditory nerve carries this electrical signal to the brain, which turns it into a sound that we recognize and understand.

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𝓗𝓸𝔀 𝓭𝓸𝓮𝓼 𝓪 𝓱𝓾𝓶𝓪𝓷 𝓮𝓪𝓻 𝓻𝓮𝓬𝓮𝓲𝓿𝓮 𝓪𝓷𝓭 𝓭𝓮𝓽𝓮𝓬𝓽 𝓼𝓸𝓾𝓷𝓭𝓼?

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𝓗𝓸𝔀 𝓭𝓸𝓮𝓼 𝓪 𝓱𝓾𝓶𝓪𝓷 𝓮𝓪𝓻 𝓻𝓮𝓬𝓮𝓲𝓿𝓮 𝓪𝓷𝓭 𝓭𝓮𝓽𝓮𝓬𝓽 𝓼𝓸𝓾𝓷𝓭𝓼?

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Hearing is the process by which the ear transforms sound vibrations in the external environment into nerve impulses that are conveyed to the brain, where they are interpreted as sounds. Sounds can be produced when objects vibrate, such as tapping the table for it produces a pressure pulse of vibrating air molecules, or Sound Waves. Our ear can identify whether a sound is high, low, or loud by analyzing the different physical characteristics of the sound waves.

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The second hand has a duration of 60 seconds, the minute hand has a duration of 3,600 seconds, and the hour hand has a duration of 43,200 seconds. That is, how long it'll take each hand to return to its original location.

The frequency is one divided by the duration.

So the frequency of the second hand is 16.667 x 10^-3 hertz

The frequency of the minute hand is 27.778 x 10^-4 hertz

The frequency of the hour hand is 23.148 x 10^-6 hertz

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What is the frequency of the second hand of a clock_ The minute hand_ The hour hand_

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⋆ 🍒  🎀  𝒫𝓇𝒶𝒸𝓉𝒾𝒸𝒶𝓁 𝒰𝓈𝒶𝑔𝑒  🎀  🍒 ⋆

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⋆ 🍒  🎀  𝒫𝓇𝒶𝒸𝓉𝒾𝒸𝒶𝓁 𝒰𝓈𝒶𝑔𝑒  🎀  🍒 ⋆

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Total internal reflection, in physics, complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle. In general, total internal reflection takes place at the boundary between two transparent media when a ray of light in a medium of higher index of refraction approaches the other medium at an angle of incidence greater than the critical angle.

Total internal reflection takes place only when the following two conditions are satisfied:

The angle of incidence is greater than the critical angle.The ray of light travels from a denser medium to a rarer medium.

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Waves have widespread applications in our daily life. The light we see is a wave, the sound we hear is a wave, every musical instrument works by waves . In fact waves have applications in almost every field of everyday life – from wireless communications to detecting over speeding vehicles, from the music of guitar to laser – almost every aspect of our everyday life in some way involves waves.

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🍑  🎀  𝒷𝑒𝓃𝑒𝒻𝒾𝓉𝓈 𝒶𝓃𝒹 𝒶𝓅𝓅𝓁𝒾𝒸𝒶𝓉𝒾❤𝓃𝓈  🎀  🍑 

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🍑  🎀  𝒷𝑒𝓃𝑒𝒻𝒾𝓉𝓈 𝒶𝓃𝒹 𝒶𝓅𝓅𝓁𝒾𝒸𝒶𝓉𝒾❤𝓃𝓈  🎀  🍑 

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Light, sound, and waves in the ocean are common examples of waves. Sound and water waves are mechanical waves; meaning, they require a medium to travel through. The medium may be a solid, a liquid, or a gas, and the speed of the wave depends on the material properties of the medium through which it is traveling. However, light is not a mechanical wave; it can travel through a vacuum such as the empty parts of outer space.

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Any wave can be fully characterized by describing three properties: wavelength, frequency, and amplitude. Like any wave, a water wave appears to move up and down in a regular pattern. The highest point reached by the wave is known as the wave crest; the lowest point reached is the wave trough (pronounced trawf)

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Meanwhile the most common example of electromagnetic waves is all the light waves seen in the electromagnetic spectrum. Starting from the left of the visible spectrum, this includes Gamma rays, X-rays, ultra-violet (UV) rays and these rays are harmful due to the high frequency it emits. In the middle, there is the visible spectrum which is the light that we can see with our eyes. Then from the right of the visible spectrum, we find the types of energy that are lower in frequency than visible light. These types of energy include infrared (IR) rays (heat waves given off by thermal bodies), microwaves, and radio waves.

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ｅｘａｍｐｌｅｓ　ｏｆ　ＥＭ　ｗａｖｅｓ

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ｅｘａｍｐｌｅｓ　ｏｆ　ＥＭ　ｗａｖｅｓ

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Most common examples of Mechanical waves are sound waves which can be produced by talking or hitting an object, water waves in the sea caused by the wind and moon’s gravity, seismic and tsunami waves caused by earthquakes and a slinky wave with each requiring a medium to exist. Sound waves require air particles, water and tsunami waves require of course, water, seismic waves require earth’s crust and a slinky wave requires a slinky toy.

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ｅｘａｍｐｌｅｓ　ｏｆ　ｍｅｃｈａｎｉｃａｌ　ｗａｖｅｓ

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ｅｘａｍｐｌｅｓ　ｏｆ　ｍｅｃｈａｎｉｃａｌ　ｗａｖｅｓ

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sound waves, ultrasound waves, seismic P-waves.

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✍️ The crest is the top of the wave. The trough is at the bottom of the wave. The wavelength is the length of the wave. The amplitude of a wave is the highest amount of vibration that the medium gives from the rest position. The rest position is the position where a wave would be if there was no movement.

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transverse waves are ripples on the surface of water, the vibrations in a guitar string, a Mexican wave in a sports stadium, seismic S (secondary) waves, and electromagnetic (radio and light) waves.

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✍️ The parts of a transverse waves includes the following: The crest is the top of the wave, the trough is the bottom of the wave, The wavelength is the length of the wave, The amplitude of a wave is is the highest amount of vibration that the medium gives from the rest position, The rest position is the position where a wave would be if there was no movement.

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1. Transverse wave, motion in which all points on a wave oscillate along paths at right angles to the direction of the wave’s advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.

2. Longitudinal wave are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave. Mechanical longitudinal waves are also called compressional or compression waves, because they produce compression and rarefaction when traveling through a medium, and pressure waves, because they produce increases and decreases in pressure. Sound travels through transversal waves in 90 degrees.

3. Surface wave is a mechanical wave that propagates along the interface between differing media. A common example is gravity waves along the surface of liquids, such as ocean waves. Gravity waves can also occur within liquids, at the interface between two fluids with different densities.

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ａｃｃｏｒｄｉｎｇ　ｔｏ　ｕｓａｇｅ　ｏｆ　ｍａｔｅｒｉａｌ／ｍｅｄｉｕｍ

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ａｃｃｏｒｄｉｎｇ　ｔｏ　ｕｓａｇｅ　ｏｆ　ｍａｔｅｒｉａｌ／ｍｅｄｉｕｍ

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Basics- An electromagnetic wave is created by a local disturbance in the electric and magnetic fields.  From its origin, the wave will propagate outwards in all directions.

Reflection- When a plane wave encounters a change in medium, some or all of it may propagate into the new medium or be reflected from it. The part that enters the new medium is called the transmitted portion and the other the reflected portion.

Refraction- When the wave enters the new medium, the speed of propagation will change. In order to match the incident and transmitted wave at the boundary, the transmitted wave will change its direction of propagation.  For example, if the new medium has a higher index of refraction, which means the speed of propagation is lower, the wavelength will become shorter (frequency must stay the same because of the boundary conditions).

Interference- All electromagnetic waves can be superimposed upon each other without limit. The electric and magnetic fields simply add at each point.  If two waves with the same frequency are combined there will be a constant interference pattern caused by their superposition.

Diffraction- Recall that the idealized plane wave is actually infinite in extent.  If this wave passes through an opening, called an aperture, it will diffract, or spread out, from the opening.  The degree to which the cropped wave will spread out depends on the size of the aperture relative to the wavelength.

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ａｃｃｏｒｄｉｎｇ　ｔｏ　ｔｈｅ　ｐｒｏｐａｇａｔｉｏｎ

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ａｃｃｏｒｄｉｎｇ　ｔｏ　ｔｈｅ　ｐｒｏｐａｇａｔｉｏｎ

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✷  🎀  𝓉𝓎𝓅𝑒𝓈 🌸𝒻 𝓌𝒶𝓋𝑒𝓈  🎀  ✷

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✷  🎀  𝓉𝓎𝓅𝑒𝓈 🌸𝒻 𝓌𝒶𝓋𝑒𝓈  🎀  ✷

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-A wave is a physical phenomenon characterized by its frequency, wavelength, and magnitude. In general, waves transfer energy from one location to another, in which case they have a velocity. A wave is a propagating dynamic disturbance of one or more quantities, sometimes as described by a wave equation. In physical waves at least two field quantities in a wave medium are involved.

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Endoscope - An endoscope is a medical instrument used for exploratory diagnostics and surgical purposes. An endoscope is used to explore the interior organs of the body. The light shines on the organ of the patient to be examined by entering through one of the fiber tubes of the endoscope. Then the light is transmitted back to the physician’s viewing lens through the outer fiber tube by the internal reflection. Flexible endoscopes have a tiny camera attached to the end.

Mirage - It is an optical illusion which is responsible for the appearance of the water layer at short distances in a desert or on the road. Mirage is an example of total internal reflection which occurs due to atmospheric refraction.