Which of these points is NOT a characteristic of a prism when used in a spectrograph?
A) A prism causes different light rays to interfere with each other.
B) A prism absorbs light unevenly over the spectrum (over the different colors).
C) A prism does not pass ultraviolet light.
D) A prism spreads the light out unevenly in wavelength.

Question

Quizplus · Accepted Answer

Prisms in a spectrograph disperse light into its component colors (spectrum) by refraction, not by causing interference. Interference is a characteristic of diffraction gratings, not prisms.

Which of These Points Is NOT a Characteristic of a Prism