Question

Which phenomenon involved in the working of an optical fibre ?

• A. Refraction
• B. Total internal reflection
• C. Diffraction
• D. Scattering

Answer 1

Answer:

B. Total internal reflection

TIR only takes place when both of the following two conditions are met: the light is in the more dense medium and approaching the less dense medium. the angle of incidence is greater than the so-called critical angle.