In a photoelectric effect experiment at a frequency above cut off, the number of electrons ejected is proportional to:
Correct answer: C. the number of photons that hit the sample
- A. their kinetic energy
- B. the work function
- C. the number of photons that hit the sample
- D. the frequency of the incident light
Explanation
In photoelectric effect electrons are emitted instantaneously; the intensity (the number of Photons that hit the sample) of light determines only their numbers.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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