Physics A-Level
Cosmic microwave background radiation
What Cosmic microwave background radiation means in Physics A-Level, as defined for OCR.
Definition of Cosmic microwave background radiation
Check what you remember
Read the wording for your board, then hide it and explain Cosmic microwave background radiation in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A faint, almost perfectly uniform microwave signal coming from every direction in space, with a black-body spectrum at about 2.7 K.
Topics that use Cosmic microwave background radiation
- Cosmology (OCR A-Level)
Related terms
- Age of the universe
- Astronomical distance units
- Baseline
- Big Bang nucleosynthesis
- Big Bang theory
- Cosmic microwave background
- Cosmological redshift
- Dark matter and its gravitational evidence
Using Cosmic microwave background radiation in the exam
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