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This quiz contains 9 questions from a mix of 1 subtopics.
What is the name given to the minimum frequency of light that causes electrons to be emitted from a metal surface?
stopping potential
work function
threshold intensity
threshold frequency
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Which equation relates the energy of a photon to the frequency of light?
E = hf
eV = 1⁄2mv2
f = E/h
hf = φ
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What happens if light of frequency lower than the threshold frequency strikes a metal surface?
electrons are still emitted but with lower kinetic energy
heat is produced instead of electrons emitted
electrons are emitted but do not escape the surface
no electrons are emitted
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What is the term for the minimum energy required to emit an electron from a metal surface?
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State two ways the photoelectric effect demonstrates the particle nature of light.
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Give two reasons why no electrons are emitted below the threshold frequency.
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What information can be determined from a photoelectric effect graph of stopping potential versus frequency?
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Calculate the threshold frequency for a metal surface with a work function of 4.2 eV.
3.2 x 1015 Hz
1.01 x 1015 Hz
5.46 x 1015 Hz
4.82 x 1015 Hz
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Determine the maximum kinetic energy of photoelectrons ejected by light with a frequency of 2 x 1015 Hz from a metal with a work function of 2.5 eV.
6.87 x 10-19 J
9.26 x 10-19 J
4.87 x 10-19 J
3.77 x 10-19 J
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