Physics · Ray Optics
Assertion (A): In optical fibers, the refractive index of the cladding must be less than that of the core. Reason (R): Total internal reflection takes place only when the ray passes from a optically denser to an optically rarer medium.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Assertion (A) is false and Reason (R) is also false.
- 2Assertion (A) is true, but Reason (R) is false.
- 3Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
- 4Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).✓
Correct answer
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
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