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If the work function of a photo - metal ...

If the work function of a photo - metal is `6.825 eV`. Its threshold wavelength will be `( c = 3 xx 10^(8) m//s)`

A

`1200 Å`

B

`1800 Å`

C

`2400 Å`

D

`3600 Å`

Text Solution

Verified by Experts

The correct Answer is:
B
`lambda_(0) = (12375)/(6.825) = 1813 Å ~~ 1800 Å`
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