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Lights of wavelenths lambda(1)=340nm and...

Lights of wavelenths `lambda_(1)=340nm` and `lambda_(2)=540nm` are incident on a metallic surface. If the ratio of the maximum speeds of electrons ejected is 2, the work function of the metal is

A

2 eV

B

1.85 eV

C

1 e V

D

1.5 eV

Text Solution

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The correct Answer is:
B
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