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The threshold wavelength for a metal sur...

The threshold wavelength for a metal surface whose photoelectric work function is 3.313 eV is……………………

A

4125 Å

B

3750 Å

C

6000 Å

D

2062.5 Å

Text Solution

Verified by Experts

The correct Answer is:
B
`phi = hv_0 rArr phi = (hc)/(lambda_0)`
`:.lambda_0 = (hc)/(phi) = (6.6 xx 10^(-34)xx 3 xx 10^8)/(3.313 xx 1.6 xx 10^(-19))=3.7352 xx 10^(-7)`
`= 3.740 xx 10^(-7) rArr lambda_0 ~~ 3740 Å`
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