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the threashold frequency v(0) for a meta...

the threashold frequency `v_(0)` for a metal is `7xx10^(14)s^(-1)` . Calculate the kinetic energy of an electron emitted when radiation of fequency `v = 1.0 xx 10^(15)s^(-1)` hits the metal .

A

`1.988 xx 10^(-17)J`

B

`1.988 xx10^(19)J`

C

`3.988 xx 10^(-19)J`

D

`1.988 xx 10^(-19)J`

Text Solution

Verified by Experts

The correct Answer is:
D
`hv = hv_(0) +kE, K.E = h(v -v_(0))`
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