The _________________ refers to the change in wavelength (and,therefore,frequency)of waves that happens if the source of the waves is moving.

A)Big Bang theory
B)Nebular theory
C)Expanding Universe theory
D)Doppler effect

Question

The _________________ refers to the change in wavelength (and,therefore,frequency)of waves that happens if the source of the waves is moving.

A)Big Bang theory 
B)Nebular theory 
C)Expanding Universe theory 
D)Doppler effect

Quizplus · Accepted Answer

The Doppler effect refers to the change in wavelength and frequency of waves due to the movement of the source. This effect is commonly observed with sound waves (e.g. the sound of a siren changing pitch as an ambulance drives by) and light waves (e.g. the redshift or blueshift of light from a star indicating its motion towards or away from us). It is not related to the Big Bang theory, Nebular theory or Expanding Universe theory.

The _________________ Refers to the Change in Wavelength (And,therefore,frequency)of Waves