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The Doppler Effect

When astronomers look at the spectra of stars in distant galaxies, they found that the
spectra looked similar from the stars of our own galaxy. However the spectra was
shifted slightly by the same (relative) amount toward the red end of the spectrum. In other
words the…

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suggested that the universe was expanding and always has been, which therefore
suggests that the universe began at a tiny point - the big bang.
So where can we see the doppler effect in every day life? As Sheldon tells us in big
bang theory `It's the apparent change in…

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