3) What is photoelectric effect?
Ans:
Ans:
- The emission of free electrons from a metal surface when light of sufficient frequency incident on the metal surface is called photoelectric effect.
- The maximum kinetic energy K(max) of an ejected electron is given by K(max) = ℎf − ϕ where ℎ is the Planck’s constant, f is the frequency of the incident photon and ϕ is the work function of the metal.
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