How is chromatic aberration MOST often corrected in a modern refracting telescope?
A) by using a combination of two lenses made from different types of glass
B) by painting the inside of the telescope jet black to minimize reflections
C) by grinding the lens surfaces into a parabolic shape
D) by using a prism to recombine the colors into white light

Question

Quizplus · Accepted Answer

Chromatic aberration in refracting telescopes is most often corrected by using a combination of two lenses made from different types of glass, known as an achromatic doublet. This setup helps to focus different wavelengths of light (colors) at the same point, reducing or eliminating the color fringing caused by chromatic aberration.

How Is Chromatic Aberration MOST Often Corrected in a Modern