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The threshold frequency, v(0) for a meta...

The threshold frequency, `v_(0)` for a metal is `7.0xx10^(14)s^(-1)`. Calculate the kinetic energy of an electron emitted, when radiation of frequency `v=1.2xx10^(15)s^(-1)`, strikes this metal.

Text Solution

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Kinetic energy of the photoelectrons `((1)/(2)mv^(2))=h(v-v_(0))`
`=(6.626xx10^(-34)J*s)(1.2xx10^(15)s^(-1)-7.0xx10^(14)s^(-1))`
`=3.31xx10^(-19)J`.
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