Question

why rainbow is hemispherical in shape?

Answer 1

Rainbow is hemespherical in shape bcoz we can only see the rainbow scattered by droplets above us not .we can see a circular rainbow if we travel in a airplane bcoz then we can see rainbow scattred by droplets both avobe and below us. 

Answer 2

rainbow is hemispherical in shape because tge atmosphere as the earth is sphere so, it hemispherical