OCR A Level Physics B (Advancing Physics)
OCR A Level Physics B (Advancing Physics) Our Place in the Universe Exam Questions
Free OCR A Level Physics B (Advancing Physics) exam questions on Our Place in the Universe, with mark schemes. Covers distances in astronomy, Doppler shift, Hubble's law, expansion of the universe and special relativity.
Our Place in the Universe exam questions
These packs of real past exam questions cover the whole of Module 5: Rise and Fall of the Clockwork Universe, including Our Place in the Universe. Work through every question on this sub-topic, then mark your answers against the mark scheme.
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A Level Physics Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About OCR A Level Physics B (Advancing Physics) Our Place in the Universe
This sub-topic covers the scale and history of the universe.
What you need to know
- Distances Light years, parsecs and radar.
- Redshift z = Δλ/λ ≈ v/c.
- Hubble's law v = H₀d and the age of the universe.
- Relativity Time dilation and the Lorentz factor.
Common mistakes in Our Place in the Universe
- Using Hubble units inconsistently.
- Applying time dilation the wrong way round.
Try three Our Place in the Universe exam-style questions
1. A galaxy has z = 0.05. Find its recession speed. (1 mark)
Show the mark scheme answer
1.5 x 10⁷ m s⁻¹.
2. State what redshift shows. (1 mark)
Show the mark scheme answer
The source is moving away.
3. Explain what time dilation means. (1 mark)
Show the mark scheme answer
Moving clocks run slow relative to a stationary observer.
Our Place in the Universe FAQs
What does this cover?
Astronomical distances, Hubble's law and relativity.
How old is the universe?
About 1/H₀, roughly 14 billion years.
What is a light year?
The distance light travels in one year.
Revise this topic with flashcards: A Level Physics Flashcards, with mark scheme answers for Anki and Quizlet.
