1.

For a certain metal the threshold frequency is v_(0). If light of frequency 2v_(0) is incident on it the electron come out with a maximum velocity of 4xx10^(6) m/s. If light of frequency of 5v_(0) is incident on it the maximum velocity of the photo electron will be

Answer»

`8XX10^(6)` m/s
`16xx10^(6)` m/s
`2XX10^(6)` m/s
`12XX10^(6)` m/s

Answer :A


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