Physics
Optical fiber works on the principle of

Refraction
Scattering
Total internal reflection
Interference

ANSWER DOWNLOAD EXAMIANS APP

Physics
What is the principle of a ''Life Jacket"?

It provides oxygen to a drowning person
It increases the volume of the person to keep him afloat
It decreases the volume of the person to keep him afloat
The person can sit on it like a raft

ANSWER DOWNLOAD EXAMIANS APP