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When radiation of wavelength lambda is ...

When radiation of wavelength `lambda ` is incident on a metallic surface , the stopping potential is `4.8 "volts"` . If the same surface is illuminated with radiation of double the wavelength , then the stopping potential becomes `1.6 "volts"`. Then the threshold wavelength for the surface is

A

`2 lamda `

B

`4 lamda `

C

`6 lamda `

D

`8 lamda `

Text Solution

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The correct Answer is:
B
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