Chromatic Aberration and Monochromatic Light – Rankers Physics
Topic: Ray Optics
Subtopic: Lens Makers Formula/ Len's Formula

Chromatic Aberration and Monochromatic Light

Assertion (A): A convex lens suffers from chromatic aberration.
Reason (R): All parallel rays of monochromatic light passing through a convex lens do not come to a focus at the same point.
 
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution:

A single convex lens suffers from chromatic aberration due to dispersion, so (A) is true. For monochromatic light, ideal parallel rays passing through a convex lens *do* converge at a single focal point (ignoring spherical aberration). Hence, (R) is false.

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