Question

what is total internal reflection (TIR)? explain one of its applications.

Answer 1

Total internal reflection refers to the complete reflection of a ray of light within a given medium from the surrounding surface

Answer 2

When light is incident upon a medium of lesser index of refraction, the ray is bent away from the normal, so the exit angle is greater than the incident angle. Such reflection is commonly called "internal reflection". The exit angle will then approach 90° for some critical incident angle θc , and for incident angles greater than the critical angle there will be total internal reflection.

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