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.

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Q: 65 (IAS/2013)
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.

question_subject: 

Science

question_exam: 

IAS

stats: 

0,78,53,23,17,13,78

keywords: 

{'rainbow': [0, 0, 0, 3], 'rain': [7, 1, 2, 16], 'sunlight': [0, 0, 1, 0], 'refraction': [0, 0, 1, 0], 'physical phenomena': [0, 0, 0, 1], 'internal reflection': [0, 0, 0, 1], 'dispersion': [0, 0, 1, 16], 'drops': [0, 0, 0, 1]}

Rainbows are produced due to the phenomena of dispersion, refraction, and internal reflection. When sunlight passes through raindrops, it undergoes dispersion, where different colors of light separate due to their different wavelengths. The dispersed light then undergoes refraction as it enters and exits the raindrop, bending the light rays and contributing to the separation of colors. Finally, the dispersed and refracted light undergoes internal reflection within the raindrop, bouncing off the inside surface of the drop and creating the rainbow effect.

Therefore, the correct answer is: 1, 2, and 3.

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