Light seems to travel along straight line paths in a transparent medium. But when light enters obliq

Question

Light seems to travel along straight line paths in a transparent medium. But when light enters obliquely from one transparent medium to another, some changes are observed. This is because different mediums have different optical densities. The extent of the change in the direction of light that takes place when it enters obliquely in a given pair of media is expressed in terms of a 'constant'. Light travels the fastest in vacuum. Light gets refracted through a transparent prism. Several phenomena are observed due to the reflection, refraction, dispersion and scattering of light by various mediums.\ Rainbow is a natural spectrum. It is produced because of\

Professor PC Thomas Classes · Answer

(a) : Water droplets acts as small prisms. These water droplets refract and disperse the incident sunlight, then reflect it internally and finally, refract it again when it comes out of the rain drop.\