Physics A-Level
Unit conversion between astronomical and SI units
What Unit conversion between astronomical and SI units means in Physics A-Level, as defined for OCR.
Definition of Unit conversion between astronomical and SI units
Check what you remember
Read the wording for your board, then hide it and explain Unit conversion between astronomical and SI units in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Because 1 Mpc = 3.09 × 10¹⁹ km, dividing km s⁻¹ Mpc⁻¹ by 3.09 × 10¹⁹ km cancels the km and gives s⁻¹.
Topics that use Unit conversion between astronomical and SI units
- 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 Unit conversion between astronomical and SI 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.
Practise Physics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge