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Rainbow The rainbow's appearance is caused by dispersion of sunlight as it goes through raindrops. The light is first refracted as it enters the surface of the raindrop,
Rainbow Six The book starts with a prologue that introduces us to the one main character, John Clark, an ex-Navy SEAL, and two other characters, Alistair Stanley
Tom Clancy rainbow six Well it is easy to see that in Tom Clancy's book rainbow six there are two main groups the first group is of course Rainbow SIX the second
Rainbow Six I Recommend Rainbow Six Author: Tom Clancy Number Of pages: 740 Characters: John Clark an ex Navy Seal Alistair Stanley executive commander of Rainbow
Tom Clancy's Rainbow 6 Tom Clancy Rainbow Six This book was published by G.P. Putnam's Sons in New York, USA. Copyright date is 1998. There are 740 pages in this
Submitted by lavenderblush on March 20, 2008
Category: Science
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The rainbow's appearance is caused by dispersion of sunlight as it goes through raindrops. The light is first refracted as it enters the surface of the raindrop, reflected off the back of the drop, and again refracted as it leaves the drop. The overall effect is that the incoming light is reflected back over a wide range of angles, with the most intense light at an angle of 40°42°. The angle is independent of the size of the drop, but does depend on its refractive index. Seawater has a higher refractive index than rain water, so the radius of a 'rain'bow in sea spray is smaller than a true rainbow. This is visible to the naked eye by a misalignment of these bows.[2]
The amount by which light is refracted depends upon its wavelength, and hence its colour. Blue light (shorter wavelength) is refracted at a greater angle than red light, but because the area of the back of the droplet has a focal point inside the droplet, the spectrum crosses itself, and therefore the red light appears higher in the sky, and forms the outer colour of the rainbow. Contrary to popular belief, the light at the back of the raindrop does not undergo total internal reflection and some light does emerge from the back. However, light coming out the back of the raindrop does not create a rainbow between the observer and the sun because spectra emitted from the back of the raindrop do not have a maximum of intensity, as the other visible rainbows do, and thus the colours blend together rather than forming a rainbow.
A rainbow does not actually exist at a particular location in the sky. It is an optical illusion whose apparent position depends on the observer's location and the position of the sun. All raindrops refract and reflect the sunlight in the same way, but only the light from some raindrops reaches the observer's eye. This light is what constitutes the rainbow for that observer. The position of a rainbow in the sky is always in the opposite direction of...
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