Physics A-Level
Astronomical distance units
What Astronomical distance units means in Physics A-Level, as defined for OCR.
Definition of Astronomical distance units
Check what you remember
Read the wording for your board, then hide it and explain Astronomical distance units in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The parsec is the distance unit used throughout OCR A Level Physics A cosmology, and it can be converted between parsecs, metres and light-years.
Topics that use Astronomical distance units
- Cosmology (OCR A-Level)
Related terms
- Age of the universe
- Baseline
- Big Bang nucleosynthesis
- Big Bang theory
- Cosmic microwave background
- Cosmic microwave background radiation
- Cosmological redshift
- Dark matter and its gravitational evidence
Using Astronomical distance units in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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