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A photon is incident having frequency 1x...

A photon is incident having frequency `1xx10^(14)"sec"^(-1).` Threshold frequency of metal is `5xx10^(13)"sec"^(-1)`. Find the kinetic energy of the ejected electron.

A

`3.3xx10^(-21)`

B

`3.3xx10^(-20)`

C

`6.6xx10^(-21)`

D

`6.6xx10^(-20)`

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