Evidence of the Photon Model

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Open Ended

Explain why the photoelectric effect cannot be explained by the wave model of light alone.

Fill in the Blank

The phenomenon where electrons are emitted from a material when light shines on it is called the ___.

Multiple Choice

Which phenomena can be explained by the wave model of light, and which by the particle model, according to the chart shown?

• Reflection, refraction, and polarization by wave model; photoelectric effect by particle model.

• Interference and diffraction by particle model; reflection and refraction by wave model.

• Photoelectric effect and polarization by wave model; diffraction by particle model.

• All phenomena by both models equally.

Multiple Choice

What is the role of photons in the context of atomic energy levels?

• Photons are emitted or absorbed when electrons transition between energy levels.

• Photons determine the mass of an electron.

• Photons are responsible for the nuclear forces within an atom.

• Photons have no role in atomic energy levels.

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Multiple Choice

Which color in the rainbow has the highest frequency according to the table?

• Red

• Green

• Blue

• Violet

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Multiple Choice

Based on the data, which colors have frequencies between 5 THz and 7 THz?

• Orange and Yellow

• Green and Blue

• Red and Violet

• Yellow and Green

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Multiple Choice

What is the relationship between color and frequency as shown in the table and graph?

• As the color darkens, the frequency increases.

• As the color lightens, the frequency increases.

• There is no relationship between color and frequency.

• Frequency stays the same for all colors.

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Fill in the Blank

As the colors of the rainbow darken, the wavelength ___.

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​ https://phet.colorado.edu/sims/html/molecules-and-light/latest/molecules-and-light_all.html

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Multiple Choice

Which types of light are mentioned in the lesson?

• Microwave, Infrared, Visible, Ultraviolet

• Radio, X-ray, Gamma ray, Infrared

• Visible, Infrared, Radio, Microwave

• Ultraviolet, X-ray, Infrared, Visible

Multiple Choice

If you were to create a scatterplot of the data, what information should you include to make your graph clear and accurate?

• A title, labeled axes with units, all data points, and a key if needed.

• Only the data points.

• A title and a key only.

• Labeled axes without units.

Multiple Choice

Which of the following best describes the significance of the photon model of light in understanding quantum phenomena?

• It explains the wave nature of light only.

• It helps understand how light interacts with matter at the atomic level.

• It is only useful for explaining classical physics.

• It is unrelated to the photoelectric effect.

Multiple Choice

What happens to most infrared photons when they encounter a carbon monoxide molecule?

• They pass by the molecule, but occasionally one is absorbed and causes vibration.

• They are all absorbed by the molecule.

• They are reflected by the molecule.

• They cause the molecule to break apart.

Fill in the Blank

All the visible photons passed by the carbon monoxide molecule, so it never ___.

Open Ended

Explain why infrared light causes the carbon monoxide molecule to vibrate, but visible and ultraviolet light do not.

Multiple Choice

Based on the observations, which types of light did NOT cause the carbon monoxide molecule to move?

• Visible and Ultraviolet

• Infrared and Visible

• Microwave and Infrared

• Ultraviolet and Infrared

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Multiple Choice

Which types of light interacted with the carbon monoxide molecule?

• Microwave and infrared

• Visible and ultraviolet

• Only ultraviolet

• All types of light

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Multiple Choice

Which types of light interacted with the ozone molecule?

• Microwave, infrared, and ultraviolet

• Only visible

• Only microwave and infrared

• All types of light

Multiple Choice

What happened to the ozone molecule when exposed to ultraviolet light?

• It broke up

• It emitted visible light

• It spun faster

• It did not change

Fill in the Blank

How do the photoelectric effect and emission spectra present evidence for the ___ model of light?

Multiple Choice

Which of the following best describes the photoelectric effect?

• The emission of light from a heated object

• The ejection of electrons from a material when light shines on it

• The splitting of light into its component colors

• The absorption of light by a gas

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​A. Amplitude
B. Speed
C. Wavelength only
D. Frequency

​A. Electron consumption
B. Electrons transitioning between energy levels
C. Electrons degrading molecular structure
D. Electrons being lost and destroyed

​A. Photon energy is too low to eject electrons
B. Intensity reduces electron energy
C. Low-frequency light does not exist
D. The surface reflects all low-frequency light

​A. Random photon collisions
B. Interference from waves
C. Electrons falling between energy levels
D. Refraction of light