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Assertion : Kinetic energy of photo elec...

Assertion : Kinetic energy of photo electrons emitted by a photosensitive surface depends upon the intensity of incident photon.
Reason : The ejection of electrons from metallic surface is possible with frequency of incident photon below the threshold frequency.

A

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

B

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

C

If assertion is true but the reason is false.

D

If both the assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
According to Einstein equation , `KE = hv - hv_(0)`, i.e., `KE` depends upon the frequency . Photoelectron emitted only if incident frequency is more than threshold frequency.
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