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1
Q:

The  optical  phenomenon  that  is  primarily responsible  for  the  observation  of  rainbow on a rainy day is 

A) diffraction B) interference
C) dispersion D) reflection

Answer:   C) dispersion



Explanation:

A rainbow is a natural spectrum appearing in the sky after a rain shower. It is caused by dispersion of sunlight by tiny water droplets, present in the atmosphere. 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 raindrops.

Subject: Physics
Exam Prep: Bank Exams
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