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Exam-style practice

The Universe answer explanations

Review worked answers and explanations for The Universe. Aligned to Cambridge IGCSE Physics.

Answer explanations

Question 21 of 22

Review the answer support, then move sideways through the set.

Paper 4 structured question: The Universe

Paper 4Theory (Extended)1 marks

Description

Expansion of the Universe

The distance to a galaxy can be calculated using the equation d = v/H₀, where 'd' is the distance, 'v' is the velocity of the galaxy, and 'H₀' is the Hubble constant.

  1. a

    State the significance of the equation d = v/H₀ in cosmology.

    [1]
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