4.5.120 - Relativistic lifetime increase

Understand situations in which the relativistic increase in particle lifetime is significant (use of relativistic equations not required).

Use - relativistic lifetime increase to connect the rule to the data and decision in the question.

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

Example: apply - relativistic lifetime increase to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Relativistic lifetime increase is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.