Physics 5054 · O Level

The Universe

3 practice questions on The Universe, with worked solutions and instant marking.

What does redshift mean?

Oct/Nov 2023

As seen from the Earth, the light from galaxy X has a lower redshift than the light from galaxy Y. Which galaxy is nearer to the Earth, and which galaxy is moving away from the Earth more quickly?

Oct/Nov 2023

A learner accidentally marks a page in a textbook that gives the definition of redshift. The mark hides the three key words 1, 2 and 3. Redshift is ......1...... in the observed ......2...... of electromagnetic radiation coming from ......3...... stars and galaxies. What are words 1, 2 and 3?

Oct/Nov 2024