5.6.164 - Radiation intensity from luminosity and distance

Use radiation intensity I = L/(4πd²), where L is luminosity and d is distance from the source.

Use - radiation intensity from luminosity and distance to connect the rule to the data and decision in the question.

This matters because - radiation intensity from luminosity and distance determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - radiation intensity from luminosity and distance to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Radiation intensity from luminosity and distance is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.