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  4. Calculate maximum kinetic energy of electrons emitted from a photo sensitive surface of work function 3.2 eV for the incident radiation of wavelength 300 nm :

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Q. Calculate maximum kinetic energy of electrons emitted from a photo sensitive surface of work function $3.2 eV$ for the incident radiation of wavelength $300 nm$ :

Dual Nature of Radiation and Matter

Solution:

$E _{ k }=\frac{ hc }{\lambda}-\phi_{ o }$
$E _{ k }=\left(\frac{6.6 \times 10^{-34} \times 3 \times 10^{8}}{300 \times 10^{-9} \times 1.6 \times 10^{-19}}-3.2\right) eV$
$=4.125-3.2=0.925 eV$