The light rays having photons of energy 1.8 eV are falling on a metal surface having a work function 1.2 eV. What is the stopping potential to be applied to stop the emitting electrons

3 eV

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1.2 eV

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0.6 eV

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1.4 eV

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Solution

The correct option is C
0.6 eV

Stopping potential $= 1.8 e V - 1.2 e V = 0.6 e V$

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The light rays having photons of energy 1.8 eV are falling on a metal surface having a work function 1.2 eV. What is the stopping potential to be applied to stop the emitting electrons

The correct option is C 0.6 eV Stopping potential =1.8eV−1.2eV=0.6eV

The correct option is C
0.6 eV

Stopping potential $= 1.8 e V - 1.2 e V = 0.6 e V$