Q. The Government of India launched a prestigious programme “National Optical Fibre Network (NOFN)” to provide broadband services to rural areas. On which principle the optical fibre works?

[A] Polarisation

[B] Total internal reflection

[C] Total internal refraction

[D] Scattering

Answer: B
Notes:

Optical fibre is a device which works on the principle of total internal reflection by which light signals can be transmitted from one place to another with negligible loss of energy. 

Source: NCERT