The amount of energy required to eject an electron from metal surface is called:
Correct answer: C. Work function
- A. Compton effect
- B. Threshold frequency
- C. Work function
- D. Pair production
Explanation
The amount of energy required to eject an electron from the surface of a metal is known as the "work function" (W). The work function is a material-specific property and represents the minimum energy needed to overcome the attractive forces that bind the electron to the metal.
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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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