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A photon of wavelength 4xx10^(-7)m strik...

A photon of wavelength `4xx10^(-7)m` strikes on metal surface, the work function of the metal being 2.13 eV.
Calculate (1) the energy of the photon (eV).
(2) The kinetic energy of the emission.

Text Solution

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(A) Energy of photon `(E)=hv=(hc)/(lambda)=((6.626xx10^(-34)Js)xx(3xx10^(8)ms^(-1)))/(4xx10^(-7)m)=4.97xx10^(-19)J`
`=(4.97xx10^(-19))/(1.602xx10^(-19))eV=3.10eV`
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