Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this?

1. Dispersion
2. Refraction
3. Internal reflection

Select the correct answer using the codes given below:
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3

Answer: (d)

Explanation– The separation of visible light into its different colors is known as dispersion. As you can see in above figure, all three phenomenon happens when a rainbow is formed.

Rainbow