Question

Calculate the wave length of the particle of a mass 1.5 gram moving with velocity 250 meter per second

Answer 1

The de Broglie equations relate the wavelength λ to the momentum p, and frequency f to the total energy E of a particle: where h is Planck's constant.

λ=

mv

h

where,

m= mass=6.62∗10

−26

Kg

h= Planck's constant=6.62∗10

−34

m

2

/Kg.s

v= velocity of particle=1000m/s

λ=

1000×6.62×10

−32

6.62×10

−34

=10

−5

m