Question

We sometimes see rainbows in monsoon season. Which of the facts is not correct about the rainbow?
A. Dispersion of incident light first, then reflection internally and finally refraction causes a rainbow.
B. Water droplets act like small prisms.
C. Sometimes there is formation of two rainbows in the sky.
D. Rainbow is formed in the direction of the sun.

Answer 1

Hint: The rainbow is made up of seven colours, and white light is made up of seven colours, and dispersion of light is the breaking of light into its basic components. As a result of the dispersion of light in the heavens, a rainbow is generated, yet light is always present in the sky during the day.

Complete step by step answer:
Now, step by step wise let us check which option is not correct:
Option A: A rainbow is a meteorological phenomenon that occurs when light is reflected, refracted, and dispersed in water droplets, resulting in a spectrum of light seen in the sky. It's shaped like a multicoloured arc.So, we can say that the above option is true.

Option B: The sun's light is made up of seven colours, and we know that when it travels through a prism, it splits into its constituents. So, after a rainstorm, there's something in the sky that acts like small prisms, and those are water droplets. The light is scattered by these water droplets, which act as prisms.So, we can say that the above option is true.

Option C: Formation of a rainbow can happen twice at the same time so we can say that there can be formation of two rainbow.So, we can say that the above option is true.ṣ

Option D:Raindrops or little water droplets in the air opposite you serve as the medium for consecutive refraction and total internal reflection to generate a rainbow that reaches your friend's eyes standing beside you. As a result, the rainbow appears to be generated in the opposite direction of the sun.So, we can say that the above option is not true.

Hence in conclusion we can say that option D is the right answer.

Note: Internal reflection produces a rainbow, which is followed by light dispersion.The water droplets have a spherical shape, and we know that different colours have distinct wavelengths and emerge from the sphere at different angles, as proven by Snell's law. The white light has now been broken down into its constituent colours, which go in slightly different directions. Water droplets emit red light, which is higher in the sky than violet light.