Red-shift and the expanding universe
Why light from distant galaxies is shifted towards red, why more distant galaxies move away faster, and how this, with the cosmic microwave background, supports the Big Bang theory.
You will be able to
- Explain what red-shift is and what it tells us about a galaxy
- Use speed and distance data for galaxies, including the gradient of a graph (Higher)
- Explain how red-shift supports the Big Bang theory and an expanding universe
25 minutes, 9 exam-style questions.