40 CFU

What is the photoelectric effect?

• The bending of light as it passes through a prism

• The emission of electrons from a metal surface when light shines on it

• The splitting of white light into different colors

• The reflection of light from a mirror

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Which model explains the photoelectric effect?

• Wave model of light

• Photon model of light

• String theory

• Newton's law of motion

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What is a photon?

• A wave of sound

• A particle of light

• A type of atom

• A magnetic field

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Which term describes light behaving both as a particle and as a wave?

• Reflection

• Refraction

• Wave-particle duality

• Diffraction

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Who first explained the photoelectric effect using the photon model?

• Isaac Newton

• Albert Einstein

• Thomas Edison

• Marie Curie

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Which of the following is an application of the photoelectric effect?

• Solar cells

• Electric motors

• Magnets

• Thermometers

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What happens to electrons in the photoelectric effect?

• They are absorbed by the metal

• They are emitted from the metal surface

• They change into protons

• They stop moving

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Which property of light is demonstrated by the photoelectric effect?

• Its wave nature

• Its particle nature

• Its color

• Its speed

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What is required for electrons to be emitted in the photoelectric effect?

• High temperature

• Light of sufficient frequency

• Strong magnetic field

• Large mass

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Which device uses the photoelectric effect to detect light?

• Thermometer

• Photocell

• Barometer

• Voltmeter

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