QUESTION IMAGE
Question
- the wavelengths of the light from galaxies that are further away from the earth are more (bold one: compressed or expanded ). 4. the wavelengths of the light from galaxies that are closer to the earth are more (bold one: compressed or expanded ).
Brief Explanations
According to the Doppler - effect in astronomy, when a galaxy is moving away from the Earth (more distant galaxies), the light it emits experiences redshift, which means the wavelengths are expanded. When a galaxy is moving towards the Earth (closer galaxies), the light experiences blueshift, which means the wavelengths are compressed.
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- expanded
- compressed