Why are rainbows are curved as semicircles?
Rainbow is a product of sunlight passing through tiny droplets of rain water. How do we see a rainbow?
All the angles in the water drop have to be just right for the drop to send some sunlight to back to us, standing on ground.
The angle may be approximately 42 degrees. Other droplets send their light to some where else. To make it simple, if we move to some new place , different droplets are required to make the rainbow visible. The rainbow may seem in semi circular shape , if the Sun is rising or setting. It may look less than a semicircle shape if the Sun is higher on the sky.
We can see a rainbow in full circle if we travel in a plane or when we produce it artificially in the laboratories.
Rainbow is a product of sunlight passing through tiny droplets of rain water. How do we see a rainbow?
All the angles in the water drop have to be just right for the drop to send some sunlight to back to us, standing on ground.
The angle may be approximately 42 degrees. Other droplets send their light to some where else. To make it simple, if we move to some new place , different droplets are required to make the rainbow visible. The rainbow may seem in semi circular shape , if the Sun is rising or setting. It may look less than a semicircle shape if the Sun is higher on the sky.
We can see a rainbow in full circle if we travel in a plane or when we produce it artificially in the laboratories.
