The threshold frequency for a photosensi...

The threshold frequency for a photosensitive surface corresponds to an energy of 6.5 eV. If the stopping potential for radiations incident on this surface is 3V, then the energy of the incident radiation will be

3.5 eV

7 eV

9.5 eV

13 eV

Text Solution

Verified by Experts

The correct Answer is:

`hv=hv_(0)+eV_(s)`
`hv_(0)=6.5eV` and `eV_(s)=3eV`
`:.hv=6.5+3=9.5eV`

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MARVEL PUBLICATION-ELECTRONS AND PHOTONS -TEST YOUR GRASP - 17

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