OCR A Level Physics A
OCR A Level Physics A Astrophysics and Cosmology Exam Questions
Free OCR A Level Physics A exam questions on Astrophysics and Cosmology, with mark schemes. Covers stars, stellar evolution, Wien's and Stefan's laws, Hubble's law and the Big Bang.
Astrophysics and Cosmology exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
OCR A Level Physics A H556 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About OCR A Level Physics A Astrophysics and Cosmology
This topic covers the universe.
What you need to know
- Stars Formation, main sequence and end states.
- Radiation laws Wien's law and Stefan-Boltzmann law.
- Spectra Energy levels and diffraction gratings.
- Cosmology Hubble's law, CMB and dark energy.
Common mistakes in Astrophysics and Cosmology
- Confusing white dwarfs and neutron stars.
- Using Celsius in Wien's law.
- Mixing light year and parsec.
Try three Astrophysics and Cosmology exam-style questions
1. State one piece of evidence for the Big Bang. (1 mark)
Show the mark scheme answer
Cosmic microwave background radiation.
2. Explain what limits a white dwarf's mass. (1 mark)
Show the mark scheme answer
The Chandrasekhar limit of 1.44 solar masses.
3. Estimate the age of the universe from H₀. (1 mark)
Show the mark scheme answer
About 1/H₀.
Astrophysics and Cosmology FAQs
What does this topic cover?
Stellar evolution, radiation laws and cosmology.
What is a parsec?
The distance at which 1 AU subtends 1 arcsecond.
What is dark energy?
The proposed cause of accelerating expansion.
Revise this topic with flashcards: OCR A Level Physics A H556 Flashcards, with mark scheme answers for Anki and Quizlet.
