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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 that the lines in the emission and absorption spectra of distant objects are shifted to longer wavelengths than their known values.
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Use Δλ / λ ≈ Δf / f ≈ v / c for the redshift of electromagnetic radiation from a source that moves relative to an observer.
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Explain why redshift suggests that the Universe is expanding.
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Recall and use Hubble’s law, v ≈ H₀d, and explain how it leads to the Big Bang theory.
Only SI units will be required.
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