Waves are Affected by the Motion of the Source Flashcards
1
Q
What happens when a source of waves is moving relative to the observer?
A
The waves will undergo a change in frequency and wavelength when they are observed, compared to when they were emitted - Doppler effect
2
Q
What does this happen will all types of (Doppler effect)?
A
Waves, including light
3
Q
What happens when a light source is moving away from you?
A
The light it emits will be shifted towards the red end of the visible part of the EM spectrum - this is red-shift
4
Q
What is the light from distant stars?
A
Red-lighted - we observe light with a longer wavelength than we would expect the stars to emit
5
Q
The stars must be …… the Earth?
A
Moving away from
