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6.2 Stars and the Universe

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Question 20

The galaxy Pegasus III is at a distance of 2.4 × 1021 m from Earth.

What is this distance in light-years?

A

3.9×105 light-years3.9 \times 10^5\text{ light-years}3.9×105 light-years

B

2.5×105 light-years2.5 \times 10^5\text{ light-years}2.5×105 light-years

C

3.9×106 light-years3.9 \times 10^6\text{ light-years}3.9×106 light-years

D

2.5×106 light-years2.5 \times 10^6\text{ light-years}2.5×106 light-years

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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