Study checklist

25.3 Hubble’s law and the Big Bang theory

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4 steps

25.3.1—The lines in the emission and absorption spectra

25.3.2—Redshift of electromagnetic radiation

25.3.3—Why redshift leads to the idea that the universe is expanding

25.3.4—Hubble’s law v ≈ H0d and explain how this leads to the Big Bang theory

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Study checklist25.3 Hubble’s law and the Big Bang theory