Question
Physics Question on Ray optics and optical instruments
Optical fibre are based on
A
total internal reflection
B
less scattering
C
refraction
D
less absorption coefficient.
Answer
total internal reflection
Explanation
Solution
An optical fibre is a device based on total internal reflection by which a light signal can be transferred from one place to the other with a negligible loss of energy. It consists of a very long and thin fibre of quartz glass. When a light ray is incident at one end A of fibre making a small angle of incidence. It suffers multiple total internal reflections and finally it reaches the point B.