Question
Tue May 10, 2011 By: Gunjan Singh

a parallel ray of light is incident on a transparent glass sphere.can total internal reflection occur in this case?why/why not?

Expert Reply
Tue May 10, 2011
Yes total internal reflection is occur when a parallel ray of lights is incident on a transparent glass sphere.
 
Let us take an example in case of raindrops, and each drops of rains are like tiny transparent glass sphere.
And when the ray of lights fall on the surface of the water droplets it refracts inside the droplets and inside the water droplet, the refracted light is reflected back when it falls on the othe surface and this reflected light is then refracted outside and in this way a rainbow is formed.
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