Rainbow Formation Dispersion of Light by Prisms Rainbow Formation Mirages One of nature's most splendid masterpieces is the rainbow. A rainbow is an excellent demonstration of the dispersion of light and one more piece of evidence that visible light is composed of a spectrum of wavelengths , each associated with a distinct color. To view a rainbow, your back must be to the sun as you look at an approximately 40 degree angle above the ground into a region of the atmosphere with suspended droplets of water or even a light mist. Each individual droplet of water acts as a tiny prism that both disperses the light and reflects it back to your eye. As you sight into the sky, wavelengths of light associated with a specific color arrive at your eye from the collection of droplets. The net effect of the vast array of droplets is that a circular arc of ROYGBIV is seen across the sky. But just exactly how do the droplets of water disperse and reflect the light? And wh...
Escalators work in much the same way that conveyor belts do, and in most cases the moving stairs are actually on a belt that rotates around a set of gears at a certain fixed speed. The gears tend to be large, and typically sit just below the steps. They are electrically powered and, as they turn, the steps move. In most cases the stairs themselves are just grooved metal that lies flat as it travels down the backside, beneath the floor, and back around again. In most cases this same system controls handrail motion, though this is an additional moving part. These machines often look really imposing, but from a mechanical perspective they tend to be pretty straightforward. Repairs are also usually pretty easy, though they can take a lot of time since they involve, in most cases, major moving parts. Accessibility is often the hardest part about servicing gears and other internal parts. he core machinery for these large appliances is usually hidden beneath the steps...
1. Rajnikanth killed the Dead Sea. 2. When Rajnikanth does push-ups, he isn't lifting himself up. He is pushing the earth down. 3. There is no such thing as evolution, it's just a list of creatures that Rajnikanth allowed to live. 4. Rajnikanth gave Mona Lisa that smile.5. Rajnikanth can divide by zero. 6. Rajnikanth can judge a book by its cover. 7. Rajnikanth can drown a fish. 8. Rajnikanth can delete the Recycle Bin. 9. Rajnikanth once got into a fight with a VCR player. Now it plays DVDs. 10. Rajnikanth can slam a revolving door. 11. Rajnikanth once kicked a horse in the chin. Its descendants are today called giraffes. 12. Rajnikanth once ordered a plate of idli in McDonald's, and got it. 13. Rajnikanth can win at Solitaire with only 18 cards. 14. The Bermuda Triangle used to be the Bermuda Square, until Rajnikanth kicked one of the corners off. 15. Rajnikanth can build a snowman out of rain. 16. Rajnikanth can strangle you with a cordless phone. 17. Raj...
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