# What do the Broglie equations relate?

##### 1 Answer

Aug 2, 2014

The de Broglie equations relate (a) the wavelength

You can find the equations at What is the De Broglie equation?

Equation 1 is

It enables us to calculate the wavelength of a particle if we know its mass and velocity.

**EXAMPLE**

Calculate the wavelength of an electron with a speed of 3.00 × 10⁷ m/s.

**Solution**

Equation 2 is

Since

or

**Example**

What is the energy of the electron in the above example?

**Solution**