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Why do thick lenses show more chromatic ...

Why do thick lenses show more chromatic aberration than thin lenses?

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Thick lenses could be assumed as made of many prisms. Each of these prisms disperse composite white light into its constitutent colours. Therefore thick lenses produce chromatic aberration.
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SUBHASH PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-TWO MARKS QUESTIONS WITH ANSWERS
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  2. Define focal length of a mirror and hence relate focal length and radi...

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  3. Why do thick lenses show more chromatic aberration than thin lenses?

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  4. Explain why convex lenses converge incident beam of light whereas conc...

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  12. Write the formula for the normal shift and explain the symbols used.

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  13. Explain why there is an early sunrise or a late sunset.

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  14. Give any two consequences of refraction of light.

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  15. Write any two practical applications of optical fibres.

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  16. What is an optical fibre? Name the principle on which it works.

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  17. Distinguish between a pure and an impure spectrum.

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  18. Define power of a refracting surface. (Define the power of a lens).

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  19. Draw a neat diagram to show dispersion of light in a prism.

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  20. Why vaccum is a non-dispersive medium?

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