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When a metallic surface is illuminated w...

When a metallic surface is illuminated with radiation of wavelength `lambda`, the stopping potential is `V`. If the same surface is illuminated with radiation of wavelength `2 lambda` , the stopping potential is `(V)/(4)`. The threshold wavelength surface is :

A

`5/2lambda`

B

`3lambda`

C

`4lambda`

D

`5lambda`

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The correct Answer is:
B
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