The number of electrons emitted in the photoelectric effect depends upon:
Correct answer: D. Intensity of incident light
- A. Wavelength of incident light
- B. Frequency of incident light
- C. Energy of incident light
- D. Intensity of incident light
Explanation
According to Planck's quantum concept, the intensity of an incident beam (electromagnetic wave) means, the number of photons in the beam. If the intensity of the beam increases, the number of photons increases, hence the number of photo-electrons emitting will increase, per the laws of photoelectric emission.
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About Dawn of Modern Physics
Classical physics cannot explain blackbody radiation and related observations, leading to Planck’s quantum theory, in which energy is emitted or absorbed in discrete packets. Photons provide the particle model of light, with energy and momentum linked to frequency and wavelength, including the photoelectric effect and its threshold frequency.
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