The Doppler Effect is a phenomenon that allows one to measure an object's:
A)temperature.
B)radius.
C)radial motion.
D)tangential motion.
E)chemical composition.

Question

Quizplus · Accepted Answer

The Doppler Effect refers to the change in frequency and wavelength of waves due to the motion of the source or the observer. In the case of light, it can be used to measure the radial motion of an object, such as a star or a galaxy, by analyzing the shift in the frequency of its spectral lines. This is known as the redshift or blueshift of the object, depending on whether it is moving away from or towards the observer, respectively. Therefore, the best choice for the object's measurement with the Doppler Effect is its radial motion (C). The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. This means that we can measure objects' radial motion using the Doppler Effect, but not their temperature, radius, tangential motion, or chemical composition.

The Doppler Effect Is a Phenomenon That Allows One to Measure