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When a metallic surface is illuminated w...

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

A

`4 lambda `

B

`5 lambda`

C

` ( 5)/( 2) lambda`

D

` 3 lambda`

Text Solution

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The correct Answer is:
D
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