![]() Silver is also a finite resource, and mining it is damaging to the environment. Silver is an extremely valuable metal, and some recyclers are willing to play or split their profits with companies that provide them with X-rays. Recycling X-rays is a good idea because you can earn money doing it. For people who do not have those machines or who only got them recently, however, their stacks of X-rays must be dealt with in a responsible manner. This new technology should decrease the stacks of old X-rays sitting around medical offices in the future. Machines that do this give off less radiation, meaning they are safer for patients, and make it is quicker and easier for technicians to receive the images. Modern X-ray machines, especially those used by dentists, can transfer images to computers rather than film. MRIs, CTs and mammograms also contain the valuable precious metal. X-rays are not the only medical images that have silver. Today X-ray machines are also used in airports to inspect passengers and their luggage for dangerous items, and to examine machinery for flaws. Within months of his discovery doctors were using rudimentary X-ray machines to look at broken bones in hospitals and on battlefields. X-rays were first discovered by a German physicist named Wilhelm Roentgen in 1895. For a more complete explanation of how X-ray machines create images, check out this article on How Stuff Works. Once the image is developed, doctors have a picture of a person’s bones. That picture cannot be seen with the naked eye, but it can be seen after a “developing” process (similar to the way photographers used to develop film). When the X-ray hits the plastic it causes a molecular change in the silver and causes it to create an image. That gel contains silver, which is very sensitive to light. The simplest explanation for how an X-ray machine works is that is passes X-rays through the body and onto a piece of plastic coated with a gel. An X-ray is similar to a light wave, but it has a different wave length and other characteristics that make it invisible to the human eye.
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