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The chromatic aberration due to a lens depends upon

The chromatic aberration due to a lens depends upon Correct Answer Dispersive power of the lens and focal length

The correct answer is option 3) i.e. Dispersive power of the lens and focal length

CONCEPT:

  • Chromatic aberration: It is the phenomenon when colours are incorrectly refracted by the lens, resulting in the colours of visible light focusing at different points, depending on their wavelength.
  • There are two types of chromatic aberration:
    • Longitudinal chromatic aberration: This occurs when different wavelengths of colour do not converge at the same point after passing through a lens.

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  • Lateral chromatic aberration: This occurs when different wavelengths of colour focus at different points on the same focal plane.

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EXPLANATION:

  • Chromatic aberration is associated with the wavelength of different colours of light. The different colours of light pass through the lens at different speeds. Hence, the bending of each colour of the light depends on the dispersive power of the medium.
  • The focal length of a lens is dependent on its refractive index. Hence, the refractive index affects the focusing of light. 
  • Thus, chromatic aberration due to a lens depends upon the dispersive power of the lens and focal length.

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