4.5.118 - Mass-energy equivalence

Be able to use the equation ∆E = c2∆m in situations involving the creation and annihilation of matter and antimatter particles.

Use - mass-energy equivalence to connect the rule to the data and decision in the question.

This matters because - mass-energy equivalence determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - mass-energy equivalence to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Mass-energy equivalence is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.