Q.

Primary rainbow is formed due to

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a

Two refraction, one internal reflection

b

Two internal reflection, one refraction .

c

One refraction, one internal reflection

d

Only one refraction

answer is A.

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Detailed Solution

Primary rainbow forms due to refraction when light enters in the water droplet and then it undergoes total internal reflection on the other side and again refraction while coming out.
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Primary rainbow is formed due to