For photoelectric emission from certain metal the cut - off frequency is `v`. If radiation of frequency `2 v` incident on the metal plate , the maximum possible velocity of the emitted electron will be (`m` is the electron mass).
A
`sqrt((hv)/(m))`
B
`(sqrt(2hv)/(m))`
C
`2 sqrt((hv)/(m))`
D
`sqrt((hv)/(2m))`
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The correct Answer is:
B
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