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.
So, the correct answer is (c)