5.6.166 - Distance by standard candles

Understand how astronomical distances can be determined using measurements of intensity received from standard candles (objects of known luminosity).

Use - distance by standard candles to connect the rule to the data and decision in the question.

This matters because - distance by standard candles determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - distance by standard candles to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Distance by standard candles is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.