Which phenomenon is responsible for the working of optical fibres?
Q1. Which phenomenon is responsible for the working of optical fibres?
Answer: Total internal reflection
Explanation: In optical fibres, light travels through a dense glass core surrounded by a less dense cladding; when light hits the core-cladding boundary at an angle greater than the critical angle, it undergoes total internal reflection and stays within the core, allowing signals to travel vast distances with minimal loss.