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For photoelectric emission from certain ...

For photoelectric emission from certain metal the cutoff fequency is v.If radiation of frequency 2 v impinges on the metal plate,the maximum possible velocity of the emitted electron will be (m is the electron's mass),

A

`sqrt((hv)/((2m)))`

B

`sqrt((hv)/(m))`

C

`sqrt((2hv)/(m))`

D

`2sqrt((hv)/(m))`

Text Solution

Verified by Experts

The correct Answer is:
C
`(1)/(2)mv_(mvx)^(2)=h(2v)-hv` `therefore v_(mvx)=sqrt((2hv)/(m))`
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