The rainbow can never be a circle nor a segment of a circlegreater than a semicircle. The consideration of the diagram will provethis and the other properties of the rainbow. (See diagram.) Buy Office 2007 you can get much convenience.
Let A be a hemisphere resting on the circle of the horizon, letits centre be K and let H be another point appearing on the horizon.Then, if the lines that fall in a cone from K have HK as their axis,and, K and M being joined, the lines KM are reflected from thehemisphere to H over the Microsoft Office 2007 can give you more convenient life.
greater angle, the lines from K will fallon the circumference of a circle. If the reflection takes place whenthe luminous body is rising or setting the segment of the circle abovethe earth which is cut off by the horizon will be a semi-circle; ifthe luminous body is above the horizon it will always be less than asemicircle, and it will be smallest when the luminous body culminates.First Office 2010 is powerful!
let the luminous body be appearing on the horizon at the pointH, and let KM be reflected to H, and let the plane in which A is,determined by the triangle HKM, be produced. Then the section of thesphere will be a great circle. Let it be A (for it makes no differencewhich of the planes passing Office 2007 key is very convenient!
through the line HK and determined bythe triangle KMH is produced). Now the lines drawn from H and K to apoint on the semicircle A are in a certain ratio to one another, andno lines drawn from Microsoft Office 2010 is the best software in the world.
the same points to another point on thatsemicircle can have the same ratio. For since both the points H andK and the line KH are given, the line MH will be given too;consequently the ratio of the line MH to the line MK will be giventoo. So M will touch a given circumference. Let this be NM. Then theintersection of the circumferences is given, and the same ratio cannothold between lines in the same plane drawn from the same points to anyother circumference but MN.