COSMIC MICROWAVE BACKGROUND (CMB) RADIATION

1 mark · Easy

Which observation about distant galaxies provides evidence that the universe is expanding?

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Correct option: Their light is red-shifted.

Common mistakes: Blue-shifted light

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Marking points

B1 · 1 mark · Chooses 'Their light is red-shifted.'

Worked solution

The correct answer is: Their light is red-shifted.