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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) `5lambda` (b) `(5)/(2)lambda` (c) `3lambda` (d) `4lambda`

A

` 3 lambda `

B

`4 lambda `

C

`5 lambda `

D

`(5)/(2) lambda `

Text Solution

Verified by Experts

The correct Answer is:
A
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