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6.2.3a Galaxies and the scale of the Universe

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Question 1
a.

State the name of the constant represented in cosmology by the symbol H0H_0H0​.

[1]
b.

Write down the equation that defines H0 H_0\,H0​ in terms of the speed v v\,v that a distant galaxy is moving away from the Earth and its distance d d\,d from the Earth.

[1]
c.

The numerical value of H0 H_0\,H0​ is 2.4 × 10-18. State the SI unit of H0H_0H0​.

[1]
d.

Use this value of H0 H_0\,H0​ to determine an estimate for the age of the Universe in seconds.

[2]
e.

State when cosmic microwave background radiation (CMBR) was formed and where in space we detect it coming from.

[2]
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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