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Learning objective

Understand that the equation d = v/H₀ provides an estimate for the age of the Universe, supporting the concept that all matter was once concentrated at a single point.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE PhysicsSpace physicsSupplement content

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Quick explanation

Understand that the equation d = v/H₀ provides an estimate for the age of the Universe, supporting the concept that all matter was once concentrated at a single point

  • This point belongs to The Universe, especially The Universe outcomes.
  • You need to be able to understand that the equation d = v/H₀ provides an estimate for the age of the Universe, supporting the concept that all matter was once concentrated at a single point.
  • The key ideas to know are Know.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Know

Why it matters

This objective helps connect The Universe outcomes to exam-style questions, flashcards, and revision notes for The Universe.

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Practice Questions7 linked questions

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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.

    Aim for approximately 1 distinct marking point.

    [1]
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