Red Shift and Doppler Effect
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6 Terms
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What is the Doppler effect?
The apparent change in wavelength and frequency of a wave emitted by a moving source
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What does the Doppler effect have impacts on?
Wavelength, frequency and light
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What is blueshift?
If an object moves towards an observer, the wavelength of light decreases (the light moves towards the blue end of the spectrum)
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What is redshift?
If an object moves away from an observer, the wavelength of light increases (the light moves towards the red end of the spectrum)
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What is a rule of redshift?
The further away the galaxy, the greater red shift
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How does red shift support the Big Bang Theory?
The light from distant galaxies is red shifted - this tells us the galaxies are moving away from us
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