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
Solution
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#### 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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