gs1medium

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

  1. 1.Dispersion
  2. 2.Refraction
  3. 3.Internal reflection

Select the correct answer using the code given below:

  1. A.1 and 2 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
▶ Answer & Explanation

Correct answer: D. 1, 2 and 3

Rainbow formation is a result of sunlight interacting with raindrops. Dispersion is crucial as it separates white sunlight into its constituent colours. Refraction occurs as light enters and exits the raindrop, bending its path. Internal reflection within the raindrop redirects the light back towards the observer, completing the process.

Source: UPSC gs1 2013

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