Doppler Effect Proven by Red Light from Distant Galaxies

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In summary, the Doppler effect is a phenomenon that occurs when the source of a wave is moving relative to the observer, resulting in a change in frequency and wavelength. This can be observed in various types of waves, including light and sound waves. The red light from distant galaxies is significant in proving the Doppler effect, as it demonstrates the effect in action. The Doppler effect also supports the theory of an expanding universe, as it provides evidence of galaxies moving away from us. It can be observed in other waves besides light, such as sound and water waves. The Doppler effect has greatly contributed to our understanding of the universe, allowing scientists to gather important information about the motion and behavior of celestial objects.
  • #1
Kglocc
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claim: the red light observed from distant galaxies proves they are moving away. (doppler effect right?)
null: because light becomes red diffracting through a medium like space dust or even by gravitation.
sorry if I'm off base or 50years behind, just a general "yes/no" or "get out of my forum you pea-brained biologist" will do .

Roger that. I'm bustin out on this funk.
 
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Make that 80 years, not 50. :smile:

Tired Light (Wikipedia)
 

Related to Doppler Effect Proven by Red Light from Distant Galaxies

1. How does the Doppler effect work?

The Doppler effect is a phenomenon where the frequency of a wave appears to change when the source of the wave is moving relative to the observer. This results in a shift in the wavelength and can be observed in various types of waves, including sound and light waves.

2. What is the significance of red light from distant galaxies in proving the Doppler effect?

The red light from distant galaxies is significant because it demonstrates the Doppler effect in action. As light travels through space, it can be affected by the motion of the source. When a galaxy is moving away from us, the light waves it emits appear to be stretched out and shifted towards the red end of the color spectrum, known as redshift. This is direct evidence of the Doppler effect.

3. How does the Doppler effect support the theory of an expanding universe?

The Doppler effect supports the theory of an expanding universe because it provides evidence that galaxies are moving away from us. This is known as Hubble's Law, which states that the farther a galaxy is from us, the faster it is moving away. This supports the idea that the universe is expanding, with distant galaxies moving away faster than those closer to us.

4. Can the Doppler effect be observed in other types of waves besides light?

Yes, the Doppler effect can be observed in other types of waves, including sound waves and water waves. When a sound source is moving towards an observer, the frequency of the sound waves increases, resulting in a higher pitch. Conversely, when the source is moving away, the frequency decreases, resulting in a lower pitch.

5. How does the Doppler effect affect our understanding of the universe?

The Doppler effect has greatly contributed to our understanding of the universe. It has helped us discover the expansion of the universe, the movement of galaxies, and even the existence of black holes. By studying the Doppler effect, scientists can gather important information about the motion and behavior of celestial objects, leading to a deeper understanding of the universe and its origins.

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