Why does a Rainbow has a curve shape for humans senses?

Answer 1

A rainbow is a different shape than it appears. It looks like a sector of a circle, or perhaps a complete circle if we're very lucky.

The actual shape of a rainbow is not a circle, it's a cone! It's a very special cone shape whose point is automagically located in your eye. In this circular zone, if there happen to be water droplets and strong sunlight at the same time, the light will bend in the droplets and break up into rainbow colours.

The exact angle between you, the sun and the droplet may mean a specific colour will be shining exactly in your direction. So you see it. You cannot tell if the light comes from a droplet very close to your eye or miles away; *it just looks like a circle*. Your brain makes it flat.

So, when someone mentions the gold at the end of the rainbow, just remember that there is no end to the rainbow -- just an edge.

Answer 2

Hi. Because the light source is a sphere and the drops which form the rainbow are roughly a sphere. Does not make sense that the shape would be a triangle.

Answer 3

A rainbow only exhist if the light hits moisture at a certain angle so it must be curved depending on where the light is in relation to the moisture and the viewr that is why you get longer and shorter rainbows.

Answer 4

It has to do with the light hitting the water droplet and the refraction index of the water droplets. It causes the a prism effect. The curve of the earth is what causes the parabolic look to the light.

Answer 5

Because of how rainbows are formed. See the reference for details.

Answer 6

Because that is the way the light shines on the broplets of water and that is the way God wanted it to look.