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Light of wavelength lambda strikes a pho...

Light of wavelength `lambda` strikes a photo - sensitive surface and electrons are ejected with kinetic energy E. Now if K.E is to be increased to `2 E` , the wavelength must be changed to `lambda'` where

A

`lambda'=(lambda)/(2)`

B

`lambda'=2lambda`

C

`(lambda)/(2)ltlambda'ltlamba`

D

`lamda'gtlambda`

Text Solution

Verified by Experts

The correct Answer is:
C
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