The Big Bang, red-shift and the expanding Universe

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Question 23
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Figure 3 shows the absorption spectra of a specific element obtained from a laboratory reference source and from four distant galaxies (P, Q, R, and S).

All spectra are drawn to the same scale and aligned vertically.

Absorption spectra of a laboratory reference source and four galaxies labeled P, Q, R, and S.

Explain, using the information in Figure 3, which galaxy is the furthest distance from Earth.

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The Big Bang, red-shift and the expanding Universe Questions

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