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Select correct statement(s) about photo...

Select correct statement(s) about photoelectric effect.

A

There is no significant time delay between the absorption of a suitable radiation and the emission of electrons.

B

Einstein analysis gives a threshold frequency above which no electron can be einitted

C

The maximum kinetic energy of the emitted photoelectrons is proportional to the frequency of incident radiation.

D

The maximuin kinetic energy of electrons does not depend on the intensity of radiation.

Text Solution

Verified by Experts

The correct Answer is:
A, D
(a,d) : The photoelectric emission is an instantaneous process without any apparent time lag.
Below threshold frequency no electron can be emitted.
According to Einstein.s photoelectric equation,
`K_(max) = h upsilon - phi_0`
where `upsilon` is the frequency of incident radiation if it is more then the threshold frequency.
The maximum kinetic energy of electrons is independent of the intensity of radiation.
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