Welcome to the 1520 Perfect Dictionary
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| X-ray diffraction | |
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| X-RAY DIFFRACTION Definition: (physics, chemistry) A method of determining crystal structure (i.e. symmetry, bond lengths and angles) based on the principle that X rays are diffracted by many crystals whose atomic dimensions are such as to allow them to act as natural diffraction gratings. If the wavelength of the X rays is known these dimensions may be determined. ___________________________________ See perfect tool (2). ____ See perfect FOOTING (2). See perfect DETERMINATION (3). ____ See perfect rule (1). ____ See perfect METHOD (1). See perfect ALLOWABLENESS. | |
1520 Products |
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1520 Products was established in 2005 with the purpose of entertaining and teaching us on key and important aspects of life (such as marriage, sex, etc) through the playing of games which will allow us to laugh but at the same time pass a message of what is the right or ideal way. |
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 1520 Sex Game |
 1520 Puzzles |
 1520 Marriage Game |