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Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Understand the term luminosity as the total power of radiation emitted by a star.
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Recall and use the inverse square law F = L / (4πd²), which relates the radiant flux intensity F to the luminosity L of the source.
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Understand that a standard candle is an object whose luminosity is known.
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Understand how standard candles are used to find the distances to galaxies.
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