Modern physics and Photoelectric effect

A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

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The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light

• Intensity

• Wavelength

• Frequency

• Energy

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A particle of light is called a photon.

• True
• False

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The energy of photoelectrons emitted from a metal surface can be increased by

• using light of higher frequency.

• using light of longer wavelength.

• using light of higher intensity.

• using monochromatic, polarized light.

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This image is an illustration of

• photoelectric effect
• Dalton's atomic theory
• Bohr model
• Quantum mechanical model

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Does high-frequency or low frequency light cause the ejection of a greater number of electrons from a metal surface?

• only high frequency
• only low frequency
• both of them
• doesn't depend to frequency

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If the brightness of a beam of light increases without changing its color, the ______ will increase.

• number of photons

• frequency of the light

• energy of the photons

• wavelength of the photons

What is the energy, in eV, of a photon that has a wavelength of 620 nm?

• 1eV

• 2eV

• 3eV

• 4eV

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Which of the following is an example of light behaving like a particle?

• interference

• Doppler effect

• diffraction

• photoelectric effect

• refraction effect

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The speed of light (c) =

• 3 x 10⁸ miles/hour
• 3 x 10⁸ meters/second
• 3 x 10⁸ kilometers/hour
• none of these

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