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6.2 Stars and the Universe

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Question 32

To determine the Hubble constant, astronomers require both the distance to a distant galaxy and the speed at which it is receding from Earth.

Which of the following measurements is used to determine the speed at which the galaxy is receding?

A

The redshift of the spectral lines of the galaxy

B

The apparent brightness of a Type Ia supernova in the galaxy

C

The period of variation of a Cepheid variable star in the galaxy

D

The parallax angle of the galaxy

Markscheme

6.2 Stars and the Universe Questions

  1. IGCSE
  2. /Physics
  3. /6.2 Stars and the Universe

104 exam-style questions on CIE IGCSE Physics 6.2 Stars and the Universe, covering 6.2.1 The Sun as a star, 6.2.2a Galaxies and astronomical distances, 6.2.2b The life cycle of a star, 6.2.3a Galaxies and the scale of the Universe, 6.2.3b Redshift, 6.2.3c The Big Bang Theory and cosmic microwave background radiation, and 6.2.3d The Hubble constant and the age of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.

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