Question

If a particle of mass 5.0 mg moves with the speed of 8.0 m/sec, then the de-Broglie’s wavelength will be: A) 1.68 x 10 -27 m C) 1.65 x 10- 29 m B) 1.70 x 10- 25 m D) 1.66 x 10- 29 m

Answer 1

Answer:

Mass of particle, m=1 gram=10

−3

Kg

Velocity, v=100ms

−1

De broglie wavelength λ=

mv

h

=

1×10

−3

×100

6.626×10

−34

=6.626×10

−33

m

Hence, option C is correct.

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