During the evolution of the universe, different forms of matter formed at different stages.
Which of the following forms of matter existed 10−5 s10^{-5}\text{ s}10−5 s after the Big Bang?
Atoms
Hadrons
Quarks
None of the above
66 exam-style questions on OCR A A Level Physics Astrophysics and cosmology, covering Stars, Electromagnetic radiation from stars, and Cosmology. Each one has a worked solution and a mark scheme showing where the marks go.