Question

Which among the following play role in the formation of Rainbow?
1. Dispersion
2. Total Internal Reflection
3. Refraction
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3

?????

Answer 1

Answer:

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Answer 2

$\Huge{\mathfrak{\pink{\underline{Answer}}}}$

[D] 1, 2 & 3

$\Huge{\mathfrak{\pink{\underline{Explanation}}}}$

Rainbow is formed due to refraction and dispersion of light in a raindrop as shown in the figure.

• When a ray of light is incident on a raindrop, it disperses into its constituent colours because of change in medium.
• On the opposite surface of the drop , rays incident and suffers internal reflection.
• When light leaves the opposite surface it again undergoes refraction and dispersion.
• Each raindrop is a sphere and it scatters light over an entire circular disc in the sky. As amount of scattering is dependent on wavelength, it plays a role in the formation of a rainbow.
• solution.