Calculate the wavelength of an electron moving with a velocity of 2.05 × 107 m s–1.
Given:
Velocity of electron = 2.05 × 107 m s–1
According to the de Broglie’s Equation:
λ = h/mv
Where,
λ = wavelength of moving particle
m = mass of electron
v= velocity of particle
h= Planck’s constant [6.62× 10-34]
λ = {[6.62× 10-34] / [9.1× 10-31] × [2.05 × 107]}
= {[6.62× 10-34] / [1.8655 × 10-23]
= 3.552× 10-11 m
Therefore, the wavelength is 3.55× 10-11 m