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Photoelectrons ar ejected from a surface...

Photoelectrons ar ejected from a surface when light of wavelenght `lamda_1=550 nm` is incident on it. The stopping potential for such electrons is `lamda_(S1)=0.19V`. Suppose that radiation of wavelength `lamda_2=190nm` is incident of the surface.
Q. Calculate the stopping potential `V_(S2)`.

A

4.47

B

3.16

C

2.76

D

5.28

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The correct Answer is:
A
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