For photoelectric effect which of the following statements are true.
(I) The kinetic energies of the photoelectrons do not depend on the frequency of light
(II) Photoelectric effect will always occur for highly intense light
(III)The maximum kinetic energy of photoelectron does not depend upon the intensity of the light
(IV)The escaping electron's kinetic energy is larger for larger frequency
Text Solution
Verified by ExpertsC
Kinetic energy of photoelectron depends on frequency as 
So, (I) is false.
Whatever be the intensity of light, if frequency is less than threshold frequency then there will be no photoemission. So (II) is false.
As (K.E) 
, so 
does not depend on intensity and for higher frequency, kinetic energy will be higher so (III) and (IV) are correct.
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