Tuesday, January 13, 2009
X-Ray dissasembling manual or a part 2..
So, you're happened to be inspired by a home build radiation emitting device and quickly slap one together connecting thick, high voltage, glowing red carbon wires to a post world war tube rectifier engulfed in to an aluminium foil. Your eyes are shining your palms are shaking.. quickly plug it in, plug it in.. not so fast. Step away from the contraption and listen here carefully. X-rays are a form of electromagnetic radiation. Light is a form of such radiation, as well as radio-waves are, the difference is been in the frequency of these waves oscillation. When dealing with radio-waves we are talking about 1.50E5-1.2E10 Hz or approximately 500 meters to 10 centimeters in wavelength. When looking at light we absorb somewhat in between infrared to ultraviolet frequency in range of 1E12 to 1E16 Hz, this is approximately in range of 1 millimeter to 7 nanometers of a wavelength. This covers not just visible spectrum but some of what we rather can feel radiation, it includes infrared (immediate burn sensation) and ultraviolet (not so immediate but more severe burn sensation). What was found and than theoretically tied up to mathematical derivations is that the higher the frequency the more energy is packed in a single quanta of such radiation also known as photon (Max Planck). X-Rays, which in the frequency spectrum positioned well above the ultra violet radiation gulping up some 1E17 to 1E19 Hz range, in fact are a bunch of quite energetic photons, racing with the speed of light, each carry a pack of energy which when absorbed on collision is capable of inflicting living tissue atoms ionisation. Lets go slow here, in our made up universe atoms consist of a positively charged nuclei surrounded by negatively charged electrons. The electrons are bonded to the nuclei by electromagnetic force. This force is by power of 3 stronger than the gravitational force, so strong the force is that it binds together materials such as for example tungsten carbide or say one of the toughest material on earth aggregated diamond nanorods. And yet this force is not infinite in its wisdom and can be broken. In fact you do it every day, say by ripping off paper for instance. Wow, call me simple, X-Ray! Well not quite. In the case of ionisation it goes deeper than a simple crack in the material. You see when you tear a material apart it brakes the bonds between molecules, bonds that are formed due to an uneven charge distribution within a molecule itself. (more on it some time later, when your head stops hurting). This does not destroy the molecules it just separates them apart. On the other hand when a photon is absorbed by an atom it energises an electron that oscillates around atoms nuclei and possibly makes such electron jump to a higher energy level or even become so exited that it abandons its nuclei to wonder off leaving the atom "broken" or ionised. If enough atoms are broken the whole chemical composition of made up by these atoms molecules changes. This in turn, for example, can upset a superfine balance inside building blocks of living tissues, proteins. And than instead of you, proteins are starting coming together in a form of little Frankensteins and that's my friends is very little fun. So there.. go drink cold beer and leave X-Ray machines to professionals.
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