When I was first getting this blog started up I was very close to calling it Self-jerking fishing rod just because it had such a nice ring to it. Self-jerking fishing rod has hair-triggered spring that snaps up catch at slightest nibble.
The incredible ruby ray is the hottest scientific discovery of the decade, but practical uses are still scarce. Here's your chance to join the search -June, 1960: Dr. T.H. Maiman, of the Hughes Aircraft Co., reports the development of the first successful ruby laser. â€”November, 1964: Popular Science publishes plans for the first do-it-yourself ruby laser. By Ronald M. Benrey IT MAY sound like science fictionâ€” but it's really science fact: You can build a working ruby laser. It could be the most challengingâ€”and rewardingâ€” home-workshop project that you have ever tackled. A ruby laser is a source of coherent light. All of the light waves in the pencil-thin, bright-red ruby laser beam are in phaseâ€”or in stepâ€”with each other. This extraordinary property of the laser beamâ€”shared by no other light sourceâ€”has spurred a world-wide search for practical uses. Ordinary light sourcesâ€”a light bulb, for exampleâ€”generate incoherent light; the light waves are out of phase with each other. Drop a pebble into a still pond, and the waves ripple out smoothly in all directions. This represents a single light wave from a light source. All light sources produce more than a single wave, however. They act as if you dropped a handful of pebbles at once: You get a jumbled clutter of waves one on top of another. This clutter of waves is analogous to incoherent light. Suppose, though, you dropped your handful of pebbles one pebble at a time, each in exactly the same spot in the pond. The waves would continuously radiate from that point. All of the wave crests would be in phase. This is coherent radiation. A ruby laser generates a coherent light beam by a similar process. Laser is an acronym for Light Amplification by Stimulated Emission of Radiation. Inside the ruby laser rodâ€”heart of the ruby laserâ€”excited atoms are stimulated to emit light waves in phase with each other.
This is just about the most American thing I’ve ever seen: Big drive-in bank can serve 15 customers at a time The entire street-level floor of the new Denver U.S. National Bank is devoted to customers who do their bankning without having to get out of their cars. It has 15 drive-in teller booths equipped […]