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Standard XII
Physics
Question

Assertion :A thick lens shows more chromatic aberration. Reason: Thick lens behave as many thin lenses.
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  3. Assertion is correct but Reason is incorrect.
  4. Both Assertion and Reason are incorrect.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C
Assertion is correct but Reason is incorrect.
D
Both Assertion and Reason are incorrect.
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Solution
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A thick lens can be considered to be a stack of prisms. Light, as it passes through a thick lens bends more because it has to travel more distance through the lens material. Different colors bend by different angles due to different refractive indices. Therefore, chromatic aberration is observed.
Thus, assertion is correct and reason is incorrect.

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