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The threshold frequency for a metal is 7...

The threshold frequency for a metal is `7.0 xx 10^(14) s^(-1)`. Calculate the kinetic energy of an electron emitted when radiation of frequency `10^(15)s^(-1)` hits the metal.

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`KE = h(v-v_(0)) = (6.625 xx 10^(-34)) (1.0 xx 10^(15) - 7.0 xx 10^(14))`
`= 1.988 xx 10^(-19) J`
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