When a photon of energy 7eV is made inci...

When a photon of energy 7eV is made incident on a metal then the emitted electron is stopped by a stopping potential of -5.5 V. The work function of metal will be:

`-1.5eV`

`1.5eV`

`12.5eV`

`37.5eV`

Text Solution

Verified by Experts

The correct Answer is:

`E= phi_(0)+eV or phi_(0)=E-eV=7-5*5=1*5eV`

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