A spectrograph is a scientific instrument that
A) measures the effectiveness of the specular reflection of mirrors.
B) spreads out light from a source into its component colors, or spectrum.
C) measures the transparency of different types of glass at different colors by using glass prisms.
D) focuses all the colors of light from a star at one point so that the total intensity of the star can be measured, for photometry.

Question

Quizplus · Accepted Answer

A spectrograph spreads out light from a source into its spectrum, allowing for the analysis of its component colors. This is crucial in fields like astronomy for determining the composition, temperature, density, and motion of celestial objects.

A Spectrograph Is a Scientific Instrument That