The spectral class of a star is related to its
A) luminosity.
B) temperature.
C) radius.
D) mass.

Question

Quizplus · Accepted Answer

The spectral class of a star is directly related to its temperature. This is because the spectral class is determined by the star's surface temperature, which affects the wavelengths of light that are emitted. As a star's temperature increases, the wavelengths of light emitted shift towards the blue end of the spectrum. Additionally, there is a specific temperature range associated with each spectral class, such that hotter stars are classified as O, B, and A, while cooler stars are classified as F, G, K, and M. Luminosity, radius, and mass are related to a star's temperature, but are not directly related to its spectral class.

The Spectral Class of a Star Is Related to Its