Question

What is an example of total internal reflection at work?

Answer 1

$\huge\underline{\underline{\boxed{{ \mathbb{SOLUTION:}}}}}$

$\leadsto$ Total internal reflection occurs when a ray of light is traveling through a medium and, when that medium changes, it does not refract into the second medium but instead it reflects back into the first medium.

By Snell's law, we know that

$\longrightarrow \sf{n_1 sin \emptyset_1 = n_2 sin \emptyset_2}$

If this happens, then $\sf{n_2 \angle n_1}$, and the ray does not lose intensity due to refraction.

$\huge\underline{\underline{\boxed{\mathbb{ANSWER:}}}}$

$\large \bm{ A.}$ A ray of light has the same intensity both entering and exiting a fiber optic cable.