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The photoelectric work function for a me...

The photoelectric work function for a metal surface is 4.125eV. The cut -off wavelength for this surface is

A

energy of incident photons is 4eV

B

energy of incident photons is 1eV

C

photoelectric current increases when we use photons of high frequency

D

energy of incident photons is 3eV

Text Solution

Verified by Experts

The correct Answer is:
A
E= W+ KE `implies KE = E -W = 4eV`
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