A certain metal when irradiated by light...

A certain metal when irradiated by light `(v=3.2xx10^(16)Hz)` emits photoelectrons with twice KE as did photoelectrons when the same metal is irradiated by light `(v=2xx10^(16)Hz)`. The `v_(0)` of the metal is

`1.2xx10^(14)Hz`

`8xx10^(15)Hz`

`1.2xx10^(16)Hz`

`4xx10^(12)Hz`

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