Photoelectric Effect Quiz

Who first observed the photoelectric effect?

• Heinrich Hertz

• J.J. Thomson

• Wilhelm Hallwachs

• Albert Einstein

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What did Albert Einstein propose about electromagnetic radiation?

• It has no properties

• It behaves only as a particle

• It behaves only as a wave

• It displays properties of both particles and waves

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What is the energy of a photon equal to?

• Its wavelength divided by Planck’s constant

• Its wavelength multiplied by its speed

• Its frequency multiplied by Planck’s constant

• Its speed divided by its frequency

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What is the unit of energy used to describe the energy of photons?

• Electron volts

• Joules

• Hertz

• Watts

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What is the minimum energy required to remove an electron from a solid called?

• Voltage

• Work function

• Ionization energy

• Photon energy

What did J.J. Thomson establish about the particles emitted from the metal?

• They were photons

• They were electrons

• They were neutrons

• They were protons

What happens when ultraviolet light is shone on a negatively charged zinc plate?

• The zinc plate emits protons

• The zinc plate becomes positively charged

• Electrons are emitted from the zinc

• The zinc plate gains more electrons

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What is the relationship between the frequency of a light wave and its wavelength?

• Frequency is the square of the wavelength

• Frequency is inversely proportional to the wavelength

• Frequency is directly proportional to the wavelength

• Frequency is unrelated to the wavelength

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What is the term for the number of photons that pass by in a given unit of time?

• Photon voltage

• Photon flux

• Photon frequency

• Photon energy

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What did the wave theory of electromagnetic radiation incorrectly predict about light energy?

• Energy depends only on frequency

• Energy is independent of frequency and brightness

• Energy depends only on brightness

• Energy depends on both frequency and brightness

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