Q.

The de Broglie wavelength of an electron moving with kinetic energy of 144 eV is nearly

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a

102×10−2nm

b

102×10−3nm

c

102×10−4nm

d

102×10−5nm

answer is B.

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Detailed Solution

de Broglie wavelength of electron,λ=12.27k( in eV)Å=12.27144=12.2712=1.02Å=102×10−3nm
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