What is the meaning of μ?
Micro- (symbol µ) is a unit prefix in the metric system denoting a factor of 10−6 (one millionth). Confirmed in 1960, the prefix comes from the Greek μικρός (mikrós), meaning "small". The symbol for the prefix comes from the Greek letter μ (mu).
A micrometer (/ma?ˈkr?m?t?r/ my-KROM-i-t?r), sometimes known as a micrometer screw gauge, is a device incorporating a calibrated screw widely used for precise measurement of components in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial,
- A micrometer is a tool used for the precise measurement of very small objects. A micrometer can measure the depth, length and thickness of whatever object fits between its anvil and spindle. It is commonly used in mechanical engineering and machining applications.
- least count is nothing but , What is the lowest value you can get from an instrument. For this what you have to do is divide Smallest division from number of divisions. Example for micrometer least count can be calculated by below formula ie; = Pitch((least division value)/ number of divisions on the scale.
- Least count error. The smallest value that can be measured by the measuring instrument is called its least count. Measured values are good only up to this value. A Vernier scale on caliper may have a least count of 0.02 mm while a micrometer may have a least count of 0.01 mm.
Particles in the air are measured in micrometer (μm), with one micrometer being one-millionth of a meter, or 1/25,400th of an inch. Sometimes, micrometre is also denoted by micron (μ). In this article, micron and micrometer are used interchangeably.
- Micrometre, also called micron, metric unit of measure for length equal to 0.001 mm, or about 0.000039 inch. Its symbol is μm. The micrometre is commonly employed to measure the thickness or diameter of microscopic objects, such as microorganisms and colloidal particles.
- Nanometre. The nanometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: nm) or nanometer (American spelling) is a unit of length in the metric system, equal to one billionth (short scale) of a metre (0.000000001 m).
- A nanometer is used to measure things that are very small. Atoms and molecules, the smallest pieces of everything around us, are measured in nanometers. For example a water molecule is less than one nanometer. A typical germ is about 1,000 nanometers.
To get the letter, character, sign or symbol "µ" : ( Lowercase letter Mu ; micro sign or micron ) on computers with Windows operating system: 1) Press the "Alt" key on your keyboard, and do not let go.
- Under Microsoft Windows, if your keyboard has a numeric keypad, you can hold down the “Alt” key while hitting “0181” on the numeric keypad. You can look up the corresponding value for various special characters in the Character Map tool that comes with Windows, in the lower right corner of the window.
- To access it, position your cursor where you'd like to insert the degree symbol and then go to Edit > Special Characters (or Edit > Emoji & Symbols) in the Menu Bar. Alternatively, you can use the keyboard shortcut Control-Command-Space.
- The following steps will help you insert special characters.
- Step 1 − In the Insert Tab, under the Symbols group, click on the Symbol command.
- Step 2 − In the Symbol dialog, select one of the special characters you want to insert in the presentation.
Updated: 29th September 2018