Which of these CANNOT be determined by examining a star's spectrum?
A) the star's spectral class
B) the star's neutrino flux
C) the star's luminosity class
D) the star's radial motion

Question

Quizplus · Accepted Answer

The star's neutrino flux cannot be determined by examining its spectrum because neutrinos are weakly interacting particles that do not produce electromagnetic radiation, which is what a spectrum consists of. Spectral analysis can reveal a star's spectral class, luminosity class, and radial motion through the analysis of light and its properties, but not the neutrino flux.

Which of These CANNOT Be Determined by Examining a Star's