# Question #43dbd

##### 1 Answer

Apr 22, 2017

#### Explanation:

I will assume that the charge on the proton is +e and that the alpha particle is 4 times as massive.

The kinetic energy of the proton as it is accelerated through the potential V is given by:

The de Broglie wavelength of the proton is given by:

Substituting the expression for **v** from

The mass of the alpha particle = 4m and the charge = 2e.