GENERAL KNOWLEDGE

Detailed explanation-1: -Light entering a water droplet is refracted. It is then reflected by the back of the droplet. As this reflected light leaves the droplet, it is refracted again, at multiple angles. The radius of a rainbow is determined by the water droplets’ refractive index.

Detailed explanation-2: -When light meets a water droplet, it is refracted at the boundary of air and water, and enters the droplet, where the light is dispersed into the seven colors. The rainbow effect occurs because the light is then reflected inside the droplet and finally refracted out again into the air.

Detailed explanation-3: -A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths–or colors. When light exits the droplet, it makes a rainbow.

Detailed explanation-4: -This is known as dispersion phenomenon. This phenomenon is caused by the change of speed of light ray of different wavelengths. So we can say a rainbow is formed due to the dispersion of sunlight from water droplets and refraction of sunlight into the water droplets. Hence, Option (B) is the correct option.

Detailed explanation-5: -Rainbows are formed when light from the sun is scattered by water droplets (e.g. raindrops or fog) through a process called refraction. Refraction occurs when the light from the sun changes direction when passing through a medium denser than air, such as a raindrop.