Like a rainbow appears ?
Such a phenomenon as a rainbow fascinates not only children but also adults.Probably for this reason, and people are wondering how a rainbow appears.The fact that the ordinary ray of sunlight or light from the lamp, is fraught with a multitude of colors.At first glance, they are imperceptible, but if you combine them with water droplets or other moisture, they are transformed, revealing all their multicolored hand.This is the answer to the question of why a rainbow colored, details about this can be found here: "Why is a rainbow colored?".
If physics has been one of your favorite things, you can refer to it in search of the answer to the question of how a rainbow is formed.From the school course we can recall the optical section.The first two components of the rainbow - light and water.What is light?This electromagnetic radiation having a small wavelength, and accordingly, each color - a definite length.For all the colors that make up the rainbow, you need white light to pass through water droplets to break it and get the seven colors of the rainbow.It can be concluded that the rainbow - it is refracted in water drops a simple beam of light.
rainbow effect on the appearance of one factor - the humid air.Every drop that randomly moves in space, is a prism that refracts light, creating a variety of colors.To a rainbow appeared, to go near rain or fog to be.Particles of light, falling into a drop of water, creating a projection, which can be seen in the sky in the form of a rainbow-arc.To a rainbow was visible drops must necessarily be opposite the sun's rays.This is the answer to the question of how to get a rainbow.
You may have noticed the phenomenon of the double rainbow.This is absolutely not an optical illusion.The fact that a rainbow is visible quite clearly, the second is blurred in the haze.A beam of light to wring a few times, but from different angles.The projection will appear in the sky twice, just the opposite.Rather, a rainbow in the same direction, and the colors are located opposite.So if you are interested in the question of why the rainbow appears in a double form, this is the answer.Look for the second colored arc and you can verify it yourself.