Doppler Effect Flashcards
1
Q
The Doppler Effect
A
The Doppler effect is the change in frequency (or pitch) of the sound detected by a listener, because the sound source and the listener have different velocities relative to the medium of sound propagation.
2
Q
Red Shifts
A
Red shifts refer to the observed shift towards longer wavelengths in the light from distant celestial objects. This shift occurs because the source of light is moving away from the observer. It is a key piece of evidence supporting the conclusion that the universe is expanding.
