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6.2.3a Galaxies and the scale of the Universe

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Question 3

An astrophysicist wants to determine the distance to a distant galaxy and its speed of recession away from Earth.

Which option correctly identifies the methods used to determine these two quantities?

A

Distance: Apparent brightness of a standard candle (e.g., a Type Ia supernova)
Speed of recession: Redshift of spectral lines from the galaxy

B

Distance: Apparent brightness of a standard candle (e.g., a Type Ia supernova)
Speed of recession: Total luminosity of the galaxy

C

Distance: Redshift of spectral lines from the galaxy
Speed of recession: Apparent brightness of a standard candle (e.g., a Type Ia supernova)

D

Distance: Total luminosity of the galaxy
Speed of recession: Apparent brightness of a standard candle (e.g., a Type Ia supernova)

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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