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Ultraviolet light by wavelength 200 nm i...

Ultraviolet light by wavelength 200 nm is incident on the polished surface of Fe(Iron). The work function of the surface is 4.71 eV. What will be its stopping potential ?
`(h = 6.626xx10^(-34) J s, 1 eV = 1.6 xx10^(-19)J,)`

A

1.5 V

B

2.5 V

C

0.5 V

D

none of these

Text Solution

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The correct Answer is:
A
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