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Rainbow

by Amanda

A rainbow is the sunís rays spread out into colours visible to the eye in the water droplets. The rainbow has arcs of colour, all having a common center.

A bow appears not only in the sky but in the air close to us. Whenever there are rain drops illuminated by the sun, we can see certain fountains.

Bows arise only because the rays of light act on these round drops and pass from the eye.

Rainbows are made of seven colours red, green, orange, yellow, blue, indigo, and violet. Actually rainbows are made of a continuum of colours, even colours that the eye canít see.

Sunlight is a range of colours. When the range of sunlight colours are combined, everything looks white. Light of different colours is refracted by different amounts when it passes from a medium.

You canít see a rainbow through polarized glasses because when light is reflected at certain angles, it becomes polarized. The rainbow's angle is close to that of reflection.

The sun is always behind you when youíre looking at a rainbow, but the rain is in the same direction of the rainbow.

A ray of sunlight enters and reflects inside a raindrop. Not all of the ray escape the raindrop. Part of the ray is reflected again. That is the cause of a reflection rainbow.

There are all kinds of rainbows. Two of them include lunar and reflection. A lunar is a rainbow that shows up on full moons. A reflection is when there are two rainbows.



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