Which of the following items is considered to be the BEST one to use in a spectrograph to disperse light into its spectrum of colors?
A) a CCD array
B) a diffraction grating
C) a glass prism
D) a two-element achromatic lens

Question

Quizplus · Accepted Answer

A diffraction grating is the best choice for dispersing light into its spectrum of colors because it has a high resolution and can separate the different wavelengths of light very effectively. A CCD array can detect the separated light, but does not disperse it. A glass prism and a two-element achromatic lens can be used for dispersion, but do not have as high resolution as a diffraction grating.

Which of the Following Items Is Considered to Be the BEST