Edexcel IGCSE Physics · Spec 8.13P-8.16P
Big Bang Evidence, the CMB and Redshift Calculations (Paper 2)
Covers describe expansion and cooling of the universe, Explain the cosmic microwave background and Use delta lambda / lambda = v/c.
Physics revision video
Big Bang Evidence, the CMB and Redshift Calculations (Paper 2)
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Spec 8.13P-8.16P
What you need to know
- Describe expansion and cooling of the universe
- Explain the cosmic microwave background
- Use delta lambda / lambda = v/c
Active recall
Quick check
Answer each question before opening the answer.
What happened to temperature as the universe expanded?
It decreased
What is the CMB?
Remnant thermal radiation from the hot early universe, now observed as microwaves
Write the redshift-speed relationship
delta lambda / lambda = v/c
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