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Mathematics
Samir Zuniga
10 October, 20:05
Symbol for 1 thousandth of a meter?
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Jr
10 October, 20:51
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The micrometre (International spelling as used by the International Bureau of Weights and Measures; [1] SI symbol: μm) or micrometer (American spelling), alsocommonly known as a micron, is an SI derived unit of length equaling 1*10-6 of ametre (SI standard prefix "micro-" = 10-6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.000039 inch).[1] The symbol μm is sometimes rendered as um if the symbol μ cannot be used, or if the writer is not aware of the distinction. [citation needed]
The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria and is also commonly used in plastics manufacturing.[1] Micrometres are the standard for grading wool by the diameter of the fibres; wool finer than 25 μm can be used for garments, while coarser grades are used for outerwear, rugs, and carpets.[2] The width of a single human hair ranges from approximately 10 to 200 μm. The first and longest human chromosome is 10μm in length.
Contents [hide] 1Examples 2SI standardization 3Symbol 4See also 5 Notes and references
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