Red shift

Question 1

The Doppler Effect

Answer 1

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

Question 2

How does the doppler effect work with visible light

Answer 2

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

Question 3

What is red shift

Answer 3

How far along the spectrum the dark lines from the stars have moved

Question 4

What does Red shift prove

Answer 4

If galaxies are moving away from us, that means the universe is expanding