What do the Broglie equations relate?
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.
Calculate the wavelength of an electron with a speed of 3.00 × 10⁷ m/s.
Equation 2 is
What is the energy of the electron in the above example?