Rainbow is formed due to – (a) only reflection (b) dispersion and total internal reflection (c) diffraction (d) scattering

Formation of Rainbow

• After a rainstorm, a rainbow is a natural spectrum that appears in the sky.
• It is brought on by the atmosphere’s microscopic water droplets scattering sunlight.
• A rainbow will always form in the opposite direction from where the Sun is.
• The water droplets perform the role of tiny prisms.
• The incident sunlight is first refracted and dispersed, then refracted internally, and then refracted once more when it emerges from the raindrop.
• Different colours are visible to the observer’s eye as a result of light dispersion and total internal reflection.
• Total internal reflection means that none of the light that might conceivably travel away from this surface is refracted and that all of it is reflected.
• Therefore, choice 2 is accurate.

Summary:

Rainbow is formed due to – (a) only reflection (b) dispersion and total internal reflection (c) diffraction (d) scattering

Total internal reflection and dispersion combine to create a rainbow. Light dispersion is the mechanism by which a white light ray splits into its individual colours as it enters a prism. The range of a light beam’s colour components is referred to as its spectrum.