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Questions  

When hydrogen atom absorbs a photon of wavelength 60 nm, photo-ionization of atom occurs. The maximum kinetic energy of emitted electron will be

a
13.6 eV
b
7'15 eV
c
3'6 eV
d
1'9 eV

detailed solution

Correct option is B

The energy of photon of wavelength of 60 nm will be=hcλ=6⋅64×10−343×10860×10−91⋅6×10−9eV=20⋅75eV We know that binding energy of electron in ll-atom = 13.6 eV . K.E. of emitted electron = zo.7s-t3-6 = 7.15eV

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