Which of the following observational techniques is most appropriate for measuring Doppler shifts?
A) Spectroscopy (taking a spectrum)
B) Imaging (taking a picture)
C) Timing (measuring how the amount of light changes with time)

Question

Quizplus · Accepted Answer

Spectroscopy is the most appropriate technique for measuring Doppler shifts because it allows us to measure the wavelength of light emitted from a source and compare it with the wavelength of the same light measured on Earth. This comparison enables us to calculate the velocity of the source relative to Earth using the Doppler shift formula.

Which of the Following Observational Techniques Is Most Appropriate for Measuring