State the scientific principle underlying the operation of fibre optics

Detailed Solution
Optical fibers work on the principle of total internal reflection.
When light ray strikes at the internal surface of optical fiber cable called such the incidence angle is greater than the critical angle, then incident light ray reflects in the same medium, and this phenomenon repeats.

Hope this helps mark me as brainiest please please

It won't lose or gain electrons if it's a covalent bond it shares the electrons with another atom or atoms. if it is an ionic bond it will lose the 3 electrons on the outer shell and become a positively charged ion.  credit goes to @sunshinebaby of answers.yahoo.com.