In photoelectric effect, the threshold frequency is:
Correct answer: A. Different for different materials
- A. Different for different materials
- B. Same for all materials
- C. Neither different nor the same
- D. Random
Explanation
The threshold frequency in the photoelectric effect is indeed different for different materials. The threshold frequency is the minimum frequency of incident light required to cause photoemission of electrons from a particular material.
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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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