Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Ray Optics/
Question 20216
JEE Physics · Easy

Ray Optics: Optical Fibre Principle MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Optical Fibre PrincipleEasyQuestion 20216

Question

Optical fibres transmit light using:
  1. A
    Interference
  2. B
    Diffraction
  3. C
    Total internal reflection at the cladding boundary
    Correct
  4. D
    Polarisation

Correct answer

Total internal reflection at the cladding boundary

Explanation

The fibre core has higher n than the cladding. Light entering at a shallow angle undergoes TIR at the core-cladding boundary and propagates along the fibre with minimal loss. Used in communications and endoscopy.

Review Ray Optics notesStart timed chapter practice