Chromatic Aberration, the Inability of a Simple Lens to Focus

question 40

Multiple Choice

Chromatic aberration, the inability of a simple lens to focus all colors of light to the same focal point, is reduced in astronomical telescopes by

• A) adding a carefully shaped mirror to the lens to produce a lens-mirror combination.
• B) combining two lenses of different shape, made from the same kind of glass.
• C) bending the lens in its mounting.
• D) combining two lenses of different shape, made from different kinds of glass.

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Definitions:

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