Question

The wave length of de-Broglie wave become smaller when *

A) Mass of particle is small
B) Mass of particle is large
C) Velocity of particle is small
D) Mass and velocity of particle is large​

Answer 1

Answer:

Correct option is C)

The de Broglie equation is λ=

p

h

=

mv

h

Here h and v are constant. So, λ is inversely proportional to m.

Since the α-particle has the highest mass among the given entities, it has the smallest de-Broglie wavelength.