Concept explainers
Interpretation:
The phenomena of
Concept introduction:
When light of certain wavelength falls on metal surface then electron is ejected. It is known as photoelectric effect.

Answer to Problem 208A
Photoelectric effect is the generation of electrons from the surface of metal with the help of photons when certain wavelength photons strike the metal surface.
The energy of the photons help to overcome the binding energy of the electron with the nucleus.
Explanation of Solution
As shown in the above figure provided in the question, electrons are ejected from metal surface. These electrons are known as free electrons as these are loosely bound with metal surface and can be ejected with some energy from photons. The minimum energy required to eject the electrons from metal surface is known as work function (W0).
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