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A certain metal when irradiated to lig...

A certain metal when irradiated to light `(v = 3.2 xx 10^(16) Hz)` emits photoelectrons with twice kinetic energy as did photoelectrons when the same metal is irradiation by light `( v = 2.0 xx 10^(16)Hz)`. The `v_(0)` Threshold frequency ) of the metal is

A

`1.2xx10^(14)Hz`

B

`8xx10^(15)Hz`

C

`1.2xx10^(16)Hz`

D

`4xx10^(12)Hz`

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The correct Answer is:
B
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