Science Fair Project Encyclopedia
Mu (letter)
Mu (upper case Μ, lower case μ) is the 12th letter of the Greek alphabet. In the system of Greek numerals it has a value of 40. In the ISO 8859 character encodings standard, it has an ordinal decimal value of 230.
The lower-case letter μ is used as a special symbol in many academic fields.
- In mathematics:
- the Möbius function in number theory
- the population mean or expected value in probability and statistics
- a measure in measure theory
- In measurement:
- the SI prefix micro-, which represents one millionth, or 10−6
- the micron, an old unit which corresponds to the micrometre (which is now denoted "µm")
- In classical physics and engineering:
- In particle physics:
- the elementary particle called the muon
Rarely, the letter μ may be used to distinguish one item represented by "m" from another (but a better option might be to use "m", "m", "m", etc.).
Letters that arose from the Greek Μ include the Latin M and Cyrillic М.
Last updated: 06-01-2005 22:24:25
09-23-2007 01:00:40
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details