Which of the following phenomena of light are involved in the formation of a rainbow?

(a) Reflection, refraction and dispersion

(b) Refraction, dispersion and total internal reflection

(c) Refraction, dispersion and internal reflection

(d) Dispersion, scattering and total internal reflection



The diagram below shows the formation of a rainbow.

  • White light enters the droplet and is dispersed as it is refracted. 
  • If the light falls at a critical angle (42°) it suffers total internal reflection 
  • It exits the raindrop after being refracted once again.

How is rainbow formed-01.jpg

So, the correct answer is (c)

  1. Class 10
  2. Chapter 11 Class 10 - Human Eye and Colourful World (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo