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6.2.3a Galaxies and the scale of the Universe

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Question 17

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

6.2.3a Galaxies and the scale of the Universe Questions

  1. IGCSE
  2. /Physics
  3. /6.2.3a Galaxies and the scale of the Universe

59 exam-style questions on CIE IGCSE Physics 6.2.3a Galaxies and the scale of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.

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