Question

Some of the light reflected off the surface instead of being refracted and entering the fibre. The amount of light can be found from the equation:

$r \: = ( \frac{n - 1}{n + 1} )^{2}$
where R is the fraction of light that is reflected and n is the refractive index of the material. Using this equation, show that most of the light is refracted into the fibre. The refractive index of the fibre is 1.4. ​

Answer 1

Answer:

When light traveling through one material reaches a second material, some of the light will be reflected, and some of the light will enter the second material. ... Refraction happens because the speed of light is different in different materials (though always less than the speed of light in a vacuum).

Explanation: