In photoelectric effect, the quantity that does NOT affect the work function is the
Correct answer: A. Intensity of incident light.
- A. Intensity of incident light.
- B. Nature of emitter material.
- C. Frequency of incident light.
- D. Potential difference in the power source.
Explanation
The correct answer is the intensity of incident light. The work function is a property of the material and is related to the minimum energy needed to eject an electron from the surface. It is not influenced by the intensity of the light, which only affects the number of electrons emitted. The nature of the emitter material determines the work function, while the frequency of the incident light must be above a certain threshold to cause photoemission. The potential difference affects the energy of emitted electrons after they have been ejected, not the work function itself.
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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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