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Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments1 Mark
MCQ
What causes chromatic aberration?
  • A
    Marginal rays
  • B
    Central rays
  • C
    Difference in radii of curvature of its surfaces
  • ✓
    Variation of focal length of lens with colour
✓

Answer

Correct option: D.
Variation of focal length of lens with colour

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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