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A photon of wavelength 4 xx 10^(-7)m str...

A photon of wavelength `4 xx 10^(-7)m` strikes on metal surface, The work function of the metal is `2.13eV`. The velocity of the photo electron is

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(C) `(1)/(2)mv^(2)=0.97eV=0.97xx1.602xx10^(-19)J" i.e. "(1)/(2)xx(9.11xx10^(-31)kg)xx v^(2)=0.97xx1.602xx10^(-19)J`
or
`v^(2)=0.341xx10^(12)=34.1xx10^(10)" or v"=5.84xx10^(5)ms^(-1)`
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