Q147 / 180 · AIIMS 2007 · Physics

Assertion : Optical fibres are used for telecommunication Reason: Optical fibres are based on the phenomenon of total internal reflection.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

Optical fibers are used in communication and it is because the phenomenon of total internal reflection, taking place inside the fiber for the signal incident. Both the statements are correct and the reason given is the right explanation.

Hence, the correct answer is option: 'A'.

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