Question

Explain how the formation of rainbow occurs.

Answer 1

Formation of Rainbow :
(a) The beautiful phenomenon of the rainbow is a combination of three different phenomena - dispersion, refraction and reflection of light.
(b) The rainbow appears in the sky after a rain shower.
(c) When light rays from the sun enter the water droplets that act like small prisms, they refract and disperse the incident sunlight.
(d) This light is then reflected internally, inside the droplet and is finally refracted again.
(e) Due to the collective effect of all these phenomena, the seven coloured rainbow 'VIBGYOR' - violet, indigo, blue, green, yellow, orange, red can be seen.