Question

What causes chromatic aberration?

A

Marginal rays

B

Central rays

C

Difference in radii of curvature of its surfaces

D

Variation of focal length of lens with colour

Easy
Solution
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Correct option is D)

Chromatic aberration occurs when a lens is either unable to bring all wavelengths of color to the same focal plane and/or wavelengths of color are focused at different positions in the focal plane. 

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