Question

The de broglie wavelength associated with a particle of mass 1 g, moving with a velocity of 100 ms−1, is

Answer 1

V= 2.05 x107 (given)

According to de Broglie’s equation,



Where, λ = wavelength of moving particle

m = mass of particle (9.10939 x 10-31)

v = velocity of particle

h = Planck’s constant (6.62 x 10-34)

Substituting the values in the expression of λ:



Hence, the wavelength of the electron moving with a velocity of 2.05 × 107 ms–1 is 3.548 × 10–11 m.