Red shift Flashcards
1
Q
The Doppler Effect
A
As a sound moves away from you, the pitch gets lower
Low pitch = lower frequency
As it is moving away the wavelength increases and therefore the frequency decreases
2
Q
How does the doppler effect work with visible light
A
the visible spectrum of light from stars contains dark lines. if these move towards the red end of the spectrum, the star is moving away
3
Q
What is red shift
A
How far along the spectrum the dark lines from the stars have moved
4
Q
What does Red shift prove
A
If galaxies are moving away from us, that means the universe is expanding
