Back to the full dot-point answer
Northern IrelandPhysicsQuick questions
A2 2 Fields, Capacitors, Particles and Astronomy
Quick questions on Astronomy and cosmology: redshift, Hubble's law and the Big Bang - CCEA A-Level Physics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are measuring stars?Show answer
A "standard candle" is an object of known luminosity (such as a Cepheid variable or a type Ia supernova); measuring how faint it appears reveals how far away it is, which is how the cosmic distance ladder is built up.
What is q1?Show answer
A spectral line of wavelength from a galaxy is observed at . Find the recession speed. Take .
What is q2?Show answer
State one piece of evidence that supports the Big Bang theory. [1 mark]
What is q3?Show answer
A star has the same luminosity as the Sun but appears as bright. How many times further away is it? [2 marks]
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.