Question

why is the shape of rainbow always in the bow shape?

Answer 1

according to me Reflection and shape. Now we can move onto why rainbows have a round shape. The final thing that happens when sunlight hits a raindrop is that some of that light bounces back, or is “reflected”. So when you see a rainbow, you're actually seeing light that has hit a raindrop and bounced back onto your eye.

Answer 2

don't know dude..........!!!!!!