CAIE IGCSE Physics: Redshift Question Bank

Practise describing redshift by comparing emitted and observed light from receding stars and galaxies.

Exam points

state redshift when observed galaxy light has a longer wavelength than emitted light
explain redshift as light shifting towards the red end as a galaxy moves away

[Maximum number: 1]

A galaxy is approximately $1.2 \times 10^{26} \mathrm{~m}$ from the Earth.

Scientists observe light from the distant galaxy.

The wavelength of the observed light is longer than the wavelength of the light emitted from the galaxy.

State the name of this effect.

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6.2.3.2—Redshift as an increase in the question 1