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Illuminating a metal surface alternately...

Illuminating a metal surface alternately with wavelengths `lambda_1 and lambda_2,` when `lambda_1 lt lambda_2,` it is observed that corresponding ratio of maximum velocities of electrons is equal to n. Then work function of metal is

A

`(hc)/(nlambda)(((1+lambda_2)/(lambda_1)))/((n^2+1))`

B

`(hc(1-lambda_2/(lambda_1)))/(n^2lambda_2(n^2-1))`

C

`(hc(n^2-lambda_2/lambda_1))/(lambda_2(n^2-1))`

D

`(hcn(1-lambda_2/lambda_1))/(lambda_2(n-1))`

Text Solution

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The correct Answer is:
C
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