ABSTRACT
When two fundamental particles collide, the total energy in the system remains the same. at is, if you sum the energies of each particle before the collision, you get the same result as you get by summing the energies of each particle aer the collision. We call this the principle of energy conservation. It is a sacrosanct law that no physicist is eager to part with. Similarly, if you sum the arrows corresponding to each particle’s momentum before the collision, you get the same result as you get by summing their momenta aer the collision. is is known as the principle of momentum conservation.
