4.5.116 - Particle interaction conservation laws

Be able to apply conservation of charge, energy and momentum to interactions between particles and interpret particle tracks.

Use - particle interaction conservation laws to connect the rule to the data and decision in the question.

This matters because - particle interaction conservation laws determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - particle interaction conservation laws to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Particle interaction conservation laws is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.