EXPERIMENTAL EVIDENCES AND WAVE PROPERTY OF LIGHT

Match

Match the following.

• Christian Huygens

• Isaac Newton

• Thomas Young

• Augustin-Jean Fresnel

• Max Planck

Light as a wave in motion

Light as a particle

Double slit experiment

Also wrote a paper on interference and diffraction

Light energy is quantized

• Light as a wave in motion

• Light as a particle

• Double slit experiment

• Also wrote a paper on interference and diffraction

• Light energy is quantized

Match

Match the following.

• Heinrich Rudolf Hertz

• Albert Einstein

• Glibert Lewis

• Arthur Holly Compton

• G.I. Taylor

Discovered photoelectric effect

Explained photoelectric effect

Use the word "photon"

Compton Effect or Compton Scattering

Interference is produced one particle at a time.

• Discovered photoelectric effect

• Explained photoelectric effect

• Use the word "photon"

• Compton Effect or Compton Scattering

• Interference is produced one particle at a time.

Match

Match the following.

• Louis De Broglie

• C.J. Davisson and L. H. Germer

• Karl Heisenberg

• Erwin Schrödinger

• Max Planck

If light waves could behave like particles, then particles should have wavelength.

Bombarded crystals with electrons and it produced diffraction.

Since wave is spread out in space, we are uncertain about its position.

Wave equation

Explained the spectrum of a “blackbody” radiator

• If light waves could behave like particles, then particles should have wavelength.

• Bombarded crystals with electrons and it produced diffraction.

• Since wave is spread out in space, we are uncertain about its position.

• Wave equation

• Explained the spectrum of a “blackbody” radiator

​Summary of the History of Light

Multiple Choice

White light is made up of a collection of colors.

• TRUE

• FALSE

Multiple Choice

What is the separation of visible light into its different colors?

• Dispersion

• Refraction

• Scattering

• Interference

Multiple Choice

The following colors have short wavelength EXCEPT...

• Blue

• Indigo

• Violet

• Green

Multiple Choice

Which of the following is an example of dispersion?

• Rainbow

• Blue sky

• White clouds

• Colors reflected in a bubble

Multiple Choice

What is the phenomenon in which light rays are redirected from its straight path when striking an obstacle like dust or gas molecules, or water vapors?

• Dispersion

• Diffraction

• Scattering

• Interference

Multiple Choice

The following are examples of Scattering EXCEPT...

• Rayleigh Scattering

• Mie Scattering

• Non - Selective Scattering

• Reflective Scattering

Multiple Choice

Rayleigh Scattering means that

• shorter wavelengths are scattered more than lights of longer wavelengths

• longer wavelengths are scattered more than lights of shorter wavelengths

Dropdown

The reason why we have an ​

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sunrise or sunset is because sunlight sunlight travels ​

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through the atmosphere and the longer distance would mean much of the blue wavelengths or ​

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are ​

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completely, thus leaving only the​

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(yellow, orange, and red)

Dropdown

Mie scattering occurs when the wavelength of the electromagnetic radiation has a ​

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to the atmospheric particles. This mostly occurs in the ​

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of the atmosphere where ​

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are more abundant and dominates when cloud conditions are overcast

Multiple Choice

The following is TRUE about non-selective scattering EXCEPT...

• It is the reason why clouds are white

• Particles are much larger than the wavelength of light

• It scatters all radiation evenly throughout the visible and infrared portions of the spectrum

• It is the reason why sunsets are red.

Match

Match the following.

• Blue sky

• White clouds

• Haze

Rayleigh scattering

Non - Selective Scattering

Mei Scattering

• Rayleigh scattering

• Non - Selective Scattering

• Mei Scattering

Multiple Choice

The colors reflected in the examples below are because of interference EXCEPT...

• soap bubble

• oil slick

• compact disc

• blue sky

Multiple Choice

The wavelengths of the two reflected rays are "in phase"

• Constructive interference

• Destructive interference

Multiple Choice

Two waves arrive together at a completely opposite phase

• Constructive interference

• Destructive interference

Multiple Choice

The two crests of two waves coincide resulting into a reinforced amplitude

• Constructive interference

• Destructive interference

Multiple Choice

It occurs when two waves are of completely opposite phase and they form a new wave of reduced amplitude.

• Constructive interference

• Destructive interference

Multiple Choice

The bending of light around an obstacle and subsequent spreading of light waves into the region behind an obstacle.

• Dispersion

• Diffraction

• Scattering

• Interference

Multiple Choice

"Refraction" of light occurs when

• light bounces off a surface.

• light bends around corners or obstacles.

• light changes direction due to a change in speed.

• light waves add together to make a new wave with larger amplitude.

Multiple Choice

"Diffraction" of light occurs when

• light bounces off a surface.

• light bends around corners or obstacles.

• light changes intensity when passing from one material into another.

• light waves add together to make a wave with larger amplitude.

Multiple Choice

For diffraction of a wave to occur...

• the wave must be a sound wave

• the wave must be traveling from a less dense to a denser material

• the wave must be traveling slower than the speed of light in a vacuum

• the wave must encounter an obstacle that is comparable in size to the wavelength of the wave

Multiple Choice

Which of the following would possibly happen at daytime if there were no particles and no scattering of light in the atmosphere?

• blue sky

• white clouds

• red subset

• black sky

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Open Ended

List down at least 5 scientists who conducted experiments about how electrons behave like waves. Give their correct and complete names.