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When a centimetre thick surfaces is illu...

When a centimetre thick surfaces is illuminated with light of wavelength `lambda`, the stopping potential is `V`. When the same surface is illuminated by light of wavelength `2lambda`, the stopping potential is `V//3`. The threshold wavelength for the surface is:

A

`(4lambda)/(3)`

B

`4 lambda`

C

`6 lambda`

D

`(8lambda)/(3)`

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The correct Answer is:
B
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RESONANCE-ATOMIC PHYSICS-Exercise ( Part II : Only one one correct type)
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