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Questions  

The de-Broglie wavelength of an electron travelling with 10% of velocity of light is equal to

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By Expert Faculty of Sri Chaitanya
a
242.4 pm
b
24.2 pm
c
2.42 pm
d
2.424

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detailed solution

Correct option is B

v = 10% of velocity of light10100×3.0×108m/s=3.0×107m/s m=9.1×10−31 kg λ=hmv=6.6×10−34J−s9.1×10−31×3×107 24.2×10−12m=24.2 pm

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