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Cambridge IGCSE Physics practice

What is the primary use of measuring distances to galaxies?

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Show answerThe Universe revisionRevise the key idea

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The Universe

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What is the primary use of measuring distances to galaxies?.

  1. A.To find new stars
  2. B.To understand the universe's expansion
  3. C.To measure the temperature of stars
  4. D.To locate black holes

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Paper 4 structured question: The Universe

Paper 4Theory (Extended)1 marks

Description

Supernova Observation

A supernova is observed with an apparent brightness of 1.0 x 10^-9 W/m^2. The absolute brightness of this type of supernova is known to be 1.0 x 10^-6 W/m^2.

  1. a

    State the formula used to calculate the distance to the galaxy.

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    [1]