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Light of wavelength lamda strikes a phot...

Light of wavelength `lamda` strikes a photoelectric surface and electrons are ejected with kinetic energy K. If K is to be increased to exactly twice its original value, the wavelength must be changed to `lamda'` such that

A

`lambda' lt lambda//2 `

B

`lambda' gt lambda//2`

C

`lambdagt lambda ' gt //2`

D

` lambda' = lambda // 2`

Text Solution

Verified by Experts

The correct Answer is:
C
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MOTION-MODERN PHYSICS -1-EXERCISE-1
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