Question

Fiber optic transmission is based on the phenomenon of:
A. Interference
B. Polarization
C. Total internal reflection
D. Photoelectric effect

Answer 1

Transmission of light rays through optical fibres observe multiple reflections when going from one media to another media, thickness of optical fibres is quite considerable. The optical fibers are widely used for transmission of data at very high speeds. It is due to the network of optical fibers beyond the oceans that we are able to access high speed internet.

Complete answer:
Transmission of data by optical fiber has revolutionised the mode of communication. As the thickness of the fibre is considerable, we can assume light ray as traveling from one medium to another and hence undergoing refraction. The rays undergo multiple total internal reflections, because of which a very small number of rays are absorbed and almost all rays are transmitted and hence is considered as one of the efficient modes of transmission.

So, the correct option is C.

Additional information:
Electrons emitted in the photoelectric effect are called photoelectrons.Below threshold frequency, the photoelectric effect does not happen. Also, upon increasing the intensity of the radiation, the kinetic energy of the photon emitted electrons does not change.

Note: Total Internal Reflection is reflection of light ray in the same medium after it gets refracted while going from one medium to other. Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization. Interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude.