Cambridge IGCSE Physics practice

Paper 3 structured question: The Universe

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

The Universe

Exam-style question

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Paper 3Theory (Core)1 marks

The light from distant galaxies is observed to be redshifted compared to light from nearby stars.

Description

Astronomers have noted that light from galaxies billions of light-years away appears redshifted, indicating their movement away from Earth.

a
State the meaning of redshift in the context of astronomy.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 3Theory (Core)2 marks

Description

Redshift is used to determine the speed at which galaxies are receding from Earth, providing insights into the expansion of the universe.

a
State two implications of redshift for our understanding of the universe.
Your answer
Aim for approximately 2 distinct marking points.
[2]