Femto
Femto is a prefix in the metric system denoting a factor of 10^-15. It was adopted in 1964 by the International System of Units (SI). The prefix comes from the Danish word femten, meaning fifteen.
Applications[edit | edit source]
Femto is commonly used in various scientific fields to measure extremely small quantities. Some of the notable applications include:
- Femtosecond: A unit of time equal to 10^-15 seconds. It is used in ultrafast laser science and time-resolved spectroscopy.
- Femtometer: A unit of length equal to 10^-15 meters, also known as a fermi. It is used in nuclear physics to measure the size of atomic nuclei.
- Femtoampere: A unit of electric current equal to 10^-15 amperes. It is used in electronics and nanotechnology.
Related Concepts[edit | edit source]
Femto is part of a series of metric prefixes used to denote various orders of magnitude. Other related prefixes include:
- Pico (10^-12)
- Nano (10^-9)
- Micro (10^-6)
- Milli (10^-3)
- Centi (10^-2)
- Deci (10^-1)
- Kilo (10^3)
- Mega (10^6)
- Giga (10^9)
- Tera (10^12)
See Also[edit | edit source]
- Metric system
- International System of Units
- Orders of magnitude (time)
- Orders of magnitude (length)
- Orders of magnitude (current)
References[edit | edit source]
External Links[edit | edit source]
| Prefix | Base 10 | Decimal | Adoption [nb 1] | |
|---|---|---|---|---|
| Name | Symbol | |||
| quetta | Q | 1030 | Script error: No such module "Gaps". | 2022[1] |
| ronna | R | 1027 | Script error: No such module "Gaps". | |
| yotta | Y | 1024 | Script error: No such module "Gaps". | 1991 |
| zetta | Z | 1021 | Script error: No such module "Gaps". | |
| exa | E | 1018 | Script error: No such module "Gaps". | 1975[2] |
| peta | P | 1015 | Script error: No such module "Gaps". | |
| tera | T | 1012 | Script error: No such module "Gaps". | 1960 |
| giga | G | 109 | Script error: No such module "Gaps". | |
| mega | M | 106 | Script error: No such module "Gaps". | 1873 |
| kilo | k | 103 | Script error: No such module "Gaps". | 1795 |
| hecto | h | 102 | 100 | |
| deca | da | 101 | 10 | |
| — | — | 100 | 1 | — |
| deci | d | 10−1 | 0.1 | 1795 |
| centi | c | 10−2 | 0.01 | |
| milli | m | 10−3 | 0.001 | |
| micro | μ | 10−6 | Script error: No such module "Gaps". | 1873 |
| nano | n | 10−9 | Script error: No such module "Gaps". | 1960 |
| pico | p | 10−12 | Script error: No such module "Gaps". | |
| femto | f | 10−15 | Script error: No such module "Gaps". | 1964 |
| atto | a | 10−18 | Script error: No such module "Gaps". | |
| zepto | z | 10−21 | Script error: No such module "Gaps". | 1991 |
| yocto | y | 10−24 | Script error: No such module "Gaps". | |
| ronto | r | 10−27 | Script error: No such module "Gaps". | 2022[1] |
| quecto | q | 10−30 | Script error: No such module "Gaps". | |
| ||||
- ↑ 1.0 1.1 "On the extension of the range of SI prefixes". 18 November 2022. Retrieved 5 February 2023.
- ↑ "Metric (SI) Prefixes". NIST.
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