Regnbogar

Regnbogar are a meteorological phenomenon caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. Rainbows take the form of a multicolored arc. They are often associated with rain and storms, but can also be seen when it is raining in one part of the sky and the sun is shining in another. The phenomenon is caused by the sunlight interacting with raindrops. Sunlight, which appears white to us, is actually made up of all the colors of the visible spectrum. When light enters a raindrop, it slows down and bends, a process called refraction. As it passes through the raindrop, the different colors of light bend at slightly different angles. Red light bends the least, while violet light bends the most. This separation of colors is called dispersion. The light then reflects off the back of the raindrop and exits, bending again as it leaves. This process creates the visible arc of colors that we see as a rainbow. The order of colors in a rainbow is always the same: red on the outside, followed by orange, yellow, green, blue, indigo, and violet on the inside. A secondary rainbow, which is fainter and has its colors reversed, can sometimes be seen above the primary rainbow. This occurs when light reflects twice inside the raindrops. The shape of a rainbow is actually a full circle, but from the ground, we typically only see the arc because the earth obstructs the lower part.