Galactic Red-shift

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Last updated 9:56 AM on 3/14/26
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7 Terms

1
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wavefront spread out symmetrically

what happens when an object emits waves normally

2
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Wavelength of waves in front of the waves decrease

Frequency increases

How moving objects causes wavelengths to change in front

3
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Wavelength of waves in front of the waves increase

Frequency decreases

How moving objects causes wavelengths to change behind

4
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The change in frequency or wavelength due to the relative motion between a source and an observer

Doppler effect

5
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If an object moves towards an observer, the wavelength of light decreases

Blueshift

6
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The observed increase in the wavelength of light due to the source moving away from the observer

redshift

7
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Light coming from distant galaxies is redshifted so they are moving away from us

Red shift proving the universe is expanding