if a light of wavelength 4000 A 2 points
is incident on the metal
surface of work function 5 eV
will the electron be ejected or
not. *
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Answer:
no electron will be emitted
Explanation:
it is because by the formula
hc/¢. (¢::wave length)
12400/4000. (when wavelength is in angstrom)
=3.1
since the energy of incident light is less than the workfunction no photoelectron will be emmitted
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