The Expanding Universe (HSC SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does a light year measure?
What does a light year measure?
Distance light travels in one year
Who first found mathematical solutions suggesting the Universe could be expanding or contracting?
Who first found mathematical solutions suggesting the Universe could be expanding or contracting?
Alexander Friedmann in 1922
What relationship did Lemaître correctly work out using observational data?
What relationship did Lemaître correctly work out using observational data?
What does the Stefan-Boltzmann Law relate?
What does the Stefan-Boltzmann Law relate?
Luminosity to temperature & surface area
What crucial discovery did Henrietta Leavitt make about Cepheid variable stars?
What crucial discovery did Henrietta Leavitt make about Cepheid variable stars?
Period is related to luminosity
What is Hubble's Law?
What is Hubble's Law?
What does redshift in a galaxy's spectrum indicate?
What does redshift in a galaxy's spectrum indicate?
The galaxy is receding from us
What does the inverse of Hubble's constant () give an estimate of?
What does the inverse of Hubble's constant () give an estimate of?
The age of the Universe
Why is the Andromeda galaxy (M31) moving towards us rather than away?
Why is the Andromeda galaxy (M31) moving towards us rather than away?
Mutual gravitational attraction
What is actually expanding in the Universe?
What is actually expanding in the Universe?
Space itself between galaxies