# What is the de Broglie wavelength of a ball with a mass of 0.20 kg when it strikes the ground after it has been dropped from a building that's 50 m tall?

##### 1 Answer

Jul 16, 2014

The de Broglie wavelength of the ball is 1.06 × 10⁻³⁴ m.

The de Broglie equation is

We know

For this, we need to know the physics formula for the velocity of a falling object after it has dropped a given distance: