Primary rainbow is formed when light suffers

A. two internal refractions before emerging out of the drop

B. one internal refractions before emerging out of the drop

C. no internal refraction

D. either one or two internal refractions before emerging out of the drop

Answer: Option B

Solution(By Examveda Team)

Primary rainbow is formed when light suffers one internal refractions before emerging out of the drop. In a primary rainbow, the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.