24.3.5—The energy of the gamma-ray photons emitted during the annihilation of an

calculate the energy of the gamma-ray photons emitted during the annihilation of an electron-positron pair.

Use —the energy of the gamma-ray photons emitted during the annihilation of an to connect the rule to the data and decision in the question.

This matters because —the energy of the gamma-ray photons emitted during the annihilation of an determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the energy of the gamma-ray photons emitted during the annihilation of an to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The energy of the gamma-ray photons emitted during the annihilation of an is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.