Question

Assertion :Optical fibres are used to transmit light without any appreciable loss in its intensity over distance of several kilometers. Reason: Optical fibres are very thick and all the light is passed through it without any loss.

• 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. Assertion is incorrect but Reason is correct

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

Optical fibers are very thin, of the order of thickness of human hair. Based on the phenomenon of total internal reflection, optical fibers transmit light over very large distances, with minimum loss in intensity.