What optical phenomenon, in which light is completely reflected within a denser medium, forms the basis of fiber-optic communication?

Explanation

Total internal reflection occurs when light traveling through a denser medium strikes the boundary with a less dense medium at an angle greater than a critical angle, causing all of the light to reflect back rather than refract out. This principle allows optical fibers to carry light signals over long distances with minimal loss, since light bounces repeatedly along the length of the thin glass or plastic fiber. Fiber-optic cables are now widely used for high-speed internet and telecommunications. Explore more Everyday Science MCQs on mcqstutor to keep practicing.