Home Physics Ray Optics Refraction at Curved Surface Chromatic aberration of lens can be correcte…
Physics Ray Optics Refraction at Curved Surface Single Correct MCQ
Published on: September 11, 2026

Chromatic aberration of lens can be corrected by

A
Reducing its aperature
B
Proper polishing of its two surfaces
C
Suitably combining it with another lens
D
Providing different suitable curvature to its two surfaces

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Text Solution

Verified by Experts
The correct answer is:
C
Step 1: Understand chromatic aberration. Chromatic aberration occurs because lenses have different refractive indices for different wavelengths of light. This results in different colors being focused at different points, leading to a blurred image.
Step 2: Analyze the options:
  • Option A: Reducing the aperture can reduce the amount of light entering, but it does not correct the distortion of colors caused by chromatic aberration.
  • Option B: Proper polishing of the lens surfaces can improve clarity but does not address chromatic aberration itself.
  • Option C: Suitably combining the lens with another lens of different materials or designs can effectively correct chromatic aberration. For instance, using an achromatic doublet which consists of a convex lens made from crown glass and a concave lens made from flint glass will bring two wavelengths into the same focus.
  • Option D: Providing different curvatures does not inherently correct color distortion caused by varying refractive indices.
Step 3: Conclusion. The best way to correct chromatic aberration is through the combination of lenses (option C).
Therefore, the correct answer is C.

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