In a photoelectric effect experiment at a frequency above cut off, the stopping potential is proportional to:
Correct answer: D. the energy of the most energetic electron after it is ejected
- A. the energy of the least energetic electron before it is ejected
- B. the energy of the least energetic electron after it is ejected
- C. the energy of the most energetic electron before it is ejected
- D. the energy of the most energetic electron after it is ejected
Explanation
This fact shows that maximum K.E. of photoelectrons directly depends upon the frequency of light but independent of the intensity of light.
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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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