Concept explainers
To explain: The reason for using achromatic lens in precision optical instruments.
Explanation of Solution
Introduction:
The focal length of a lens is governed by the refractive index of the material from which the lens is made up of. For the increase of wavelength, most of the material shows decrease in its refractive index. Hence there will be variation in the refractive index of the lens with the
If a lens is used in an optical instruments, there will be distortion in the image produced due to the chromatic aberration. In order to minimize this chromatic aberration, achromatic lens is used in high precision optical instruments. Achromatic lens is the combination of lenses that made from different materials.
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