First slide

The lens

Question

The chromatic Aberration in lenses becomes due to

Moderate

A

Disimilarity of main axis of rays
B

Disimilarity of radii of curvature
C

Variation of focal length of lenses with wavelength
D

None of these

Solution

$f \propto \frac{1}{μ - 1} and μ \propto \frac{1}{λ}$

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