NDA2019General AbilityGeneral ScienceActual
Light rays move in straight lines. But through an optical fibre, they can move in any type of zigzag path because.
Options
- Athe holes through the fibre are extremely fine.
- Blight rays are absorbed at the entry end and relieved at the exit end of the fibre.
- Cscattering of light occurs inside the fibre.
- Dsuccessive total internal reflections occur as a ray moves through the fibre.
Correct answer
D. successive total internal reflections occur as a ray moves through the fibre.
Step-by-step solution
An optical fiber transmit data in the form of light particles that pulse through a fiber optic cable. The glass fiber core and the cladding each have a different refractive index that bends incoming light at a certain angle. When light signals are sent through the fiber optic cable, they reflect off the core and cladding in a series of zig-zag bounces, adhering to a process called total internal reflection.