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Assertion : The number of electrons ejec...

Assertion : The number of electrons ejected from a metal surface depend upon the frequency of light.
Reason : There is a time lag between the striking of light beam and the ejection of electrons from the metal surface.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
The number of electrons ejected is proportional to the intensity or brightness of light and the electrons are ejected from the metal surface as soon as the beam of light strikes i.e., there is no time lag between the striking of light beam and the ejection of electrons from the metal surface.
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