question_answer

Photoelectrons are ejected from a metal when light of frequency \[\upsilon \] falls on it. Pick out the wrong statement from the following.                           [JEE ONLINE 26-05-2012]

A) No electrons are emitted if o is less than W/h, where W is the work function of the metal

B) The ejection of the photoelectrons is instantaneous.

C) The maximum energy of the photoelectrons is \[h\upsilon .\]

D) The maximum energy of the photoelectrons is independent of the intensity of the light.

Correct Answer: C

Solution :

[c] According to photo-electric equation:

(Work function)

Some sort of energy is used in ejecting the photoelectrons.