Homework Help

How are the expanding universe and the Doppler effect related to one another?

luluxs's profile pic

Posted via web

dislike 0 like

How are the expanding universe and the Doppler effect related to one another?

3 Answers | Add Yours

james0tucson's profile pic

Posted (Answer #1)

dislike 0 like

The Doppler Effect is evidence that the universe is expanding.  When stars or galaxies are moving away from us, we see their color as red shifted. Because the distant galaxies are red shifted, this means that they are all receding with respect to Earth.  In the theory of Special Relativity, Albert Einstein predicted that spacetime itself is expanding. 

The observation of the Doppler Effect on light was a problem for physics because the frequency of light does not change.  Einstein's famous conclusion was that time was changing with respect to gravity, while the velocity of light remained constant.

Sources:

astrosonuthird's profile pic

Posted (Answer #2)

dislike 0 like

Yes! It is correct!

astrosonuthird's profile pic

Posted (Answer #3)

dislike 0 like

Hello enotes users.

 

Andromeda galaxy and Milky Way galaxy is coming closer and the universe is expanding.

 

 

Will it crash!!!!!!!!!!

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes