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Light of wavelength lambda shines on a m...

Light of wavelength `lambda` shines on a metal surface with initail X and the metal emit Y electron per second of average Z what will happen to Y and Z if X is doubled ?

A

Y will increase and Z will decrease

B

Z will increase and Y remains constant

C

Z will decrease and Y remains constant

D

Y will decrease and Z will increase.

Text Solution

Verified by Experts

The correct Answer is:
B
If `lambda` is halvedm, energy associated with photon doubles. As such average energy of ejected photoelectrons (Z) increases. Number of photoelectrons depends upon the intensity of incident light and not upon its wavelength or frequency. As such, number of photoelectrons (Y) ejected remains constant.
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