Wave-particle duality - 1 | Early Quantum Theory

An electron has a velocity of 5.0 x 105 m.s-1, what is its wavelength?

Data: me- = 9.109 x 10-28 g

De Broglie’s theory:

λ = h / p = h / mv

⇒ λ = 1.5 x 10-9 m