Which of the following statement is incorrect:
Correct answer: B. The photoelectric current increases with the frequency of incident light
- A. Photoelectric emission does not occur below the threshold frequency
- B. The photoelectric current increases with the frequency of incident light
- C. Threshold frequency depends on the metal used
- D. The emission of photoelectrons is an instantaneous process
Explanation
In photoelectric effect Electrons are emitted instantaneously; the intensity of light determines only their numbers. So, photoelectric current is independent on the frequency 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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