THE DOPPLER EFFECT

1 mark · Normal

Which of the following is direct evidence that the universe is expanding?

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Correct option: Red-shift in the light from distant galaxies

Common mistakes: Confusing red-shift with blue-shift

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A1 · 1 mark · Correct option selected: Red-shift in the light from distant galaxies.

Worked solution

Red-shift in the light from distant galaxies is evidence that they are moving away, indicating expansion.