The rainbow phenomenon

arises from its interaction

light with water droplets through refraction,

reflection and scattering. When the solar

light behind you enters a drop

of water, is reflected within the drop and

finally exits, changing direction.

The total deviation D between the original

and the final direction of the light

must be calculated. Think of all of them

angles of incidence from $0$ to $90$ and locate the angle where they converge

more rays. For these angles, prove that violet light is deflected by

$40\mathrm{.}8$ and red light by $42\mathrm{.}5.$ The refractive indices for violets and reds

colors are $1,342$ and $1,330$ respectively.