In photo electric effect, the energy pho...

In photo electric effect, the energy photon striking a metallic surface is `5.6 xx 10^(-19)J`. The kinetic energy of the ejected electrons is `12.0xx 10^(-20)J`. The work function is

`6.4 xx 10^(-19)J`

`6.8xx 10^(-19)J`

`4.4xx 10^(-19)J`

`6.4 xx 10^(-20)J`

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The correct Answer is:

`hv = W +K.E., W = hv - K.E`

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