Question

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 1

D -1,2,3 is right answer

Answer 2

The correct answer will be D) 1, 2 and 3

Explanation :

A rainbow is always formed in a direction opposite to that of the Sun. The water droplets act like small prisms. They refract and disperse the incident sunlight, then reflect it internally, and finally refract it again when it comes out of the raindrop Due to the dispersion of light and internal reflection, different colours reach the observer’s eye.

Hence all the 3 phenomena i.e. Dispersion , Refraction, and  Internal reflection are responsible for rainbow formation. So correct answer will be D) 1, 2 and 3