Physics A-Level
Expansion and cooling of the universe
What Expansion and cooling of the universe means in Physics A-Level, as defined for OCR.
Definition of Expansion and cooling of the universe
Check what you remember
Read the wording for your board, then hide it and explain Expansion and cooling of the universe in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
As space-time expanded, the radiation was stretched to microwave wavelengths and cooled to its present 2.7 K.
Topics that use Expansion and cooling of the universe
- Cosmology (OCR A-Level)
Related terms
- Age of the universe
- Astronomical distance units
- Baseline
- Big Bang nucleosynthesis
- Big Bang theory
- Cosmic microwave background
- Cosmic microwave background radiation
- Cosmological redshift
Using Expansion and cooling of the universe in the exam
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