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When a certain metal was irradiated wit...

When a certain metal was irradiated with light of frequency `1.6 xx 10^(16) Hz` , kinetic energy of the photoelectron emitted was twice the kinetic energy of the photoelectron emitted when the same metal was irradiated with light of frequency `1.0 xx 10^(16) Hz` . Calculate the threshold frequency `(nu_(0))` for the metal.

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The correct Answer is:
`4xx10^(15)Hz`
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