Question 21 of 37 in Cosmology

COSMIC MICROWAVE BACKGROUND (CMB) RADIATION

1 mark · Easy

A scientist observes that the absorption lines in the spectrum of a distant galaxy have moved towards longer wavelengths than those from our Sun. State the name of this effect.

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Red-shift

Also accept: red shift; redshift

Common mistakes: blue-shift; doppler effect

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Marking points

B1 · 1 mark · States 'red-shift' or accepted phrasing.

Worked solution

The effect is called 'red-shift'.

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