why is the rainbow always in the form of a bow....?

Answer 1

A rainbow is refracted equally in all directions, causing a circular shape or "ring". The distance you are from the water causing the refraction , among many more complicated factors defines the size it appears to be. This is usually too large to see it all and thus part of it is cut off by the earth and what you see is a partial ring.

Answer 2

The main reason for the formation of a rainbow is the refraction and reflection of the sun's rays as they fall on drops of rain.
As a ray passes into a drop of rain,the water acts as a tiny prism.The ray is bent or refracted as it enters the drop and is separated into different colours and then reflected towards the eye of the obsever.Each colour is formed by rays that reach the eye at a certain angle.This value is 42 degrees for a primary rainbow.
According to simple geometrical principles,all the rain drops which lie at this particular angle and in a direction opposite to the sun,lie in the form of a full circle or a part of it(arc).Even if there are enough drops to form a full circle, to an obsever on the earth's surface,it will look like an arc only as it is limited by the horizon.

Answer 3

rainbow is created due to refraction of water droplets or water bodies. that's why you often see after rain showers.

rainbow is always in the form of a bow bcoz you only see it in land.

rainbows can also be seen i the sky. but in the sky, you can see now the whole ring of rainbow.

rainbows can also be created like spraying some water in the air. look and you'll see a reainbow but not a bow.

Answer 4

I have seen a circle[round] rainbow in the sky.
You could only see it at a certain angle stepped one pace in any direction and it disappeared.