To help compare different orders of magnitude, the following list describes various frequencies, which is measured in hertz.
| Factor (Hz) |
Multiple | Value | Item |
|---|---|---|---|
| 10−18 | 1 attohertz (aHz) | ~2.29 aHz | The Hubble Constant (once in 13.8 billion years) |
| 10−15 | 1 femtohertz (fHz) | ||
| 10−12 | 1 picohertz (pHz) | ||
| 10−11 | 10 pHz | ~31.71 pHz | Once per millennium |
| 10−10 | 100 pHz | ~317.1 pHz | Once per century |
| 10−9 | 1 nanohertz (nHz) | ~1 nHz | Once per generation |
| ~3.171 nHz | Once per decade | ||
| 10−8 | 10nHz | 11.6699016 nHz | Once in a blue moon |
| ~31.71 nHz | Yearly (or Earth's orbital frequency) | ||
| 10−7 | 100 nHz | ~380.5 nHz | Monthly (or the Moon's orbital frequency) |
| ~413 nHz | Average menstrual cycle (28 days) | ||
| 10−6 | 1 microhertz (µHz) | ~1.653 µHz | Weekly |
| 10−5 | 10 µHz | ~11.57 µHz | Daily (or Earth's rotation frequency) |
| 10−4 | 100 µHz | ~277.8 µHz | Once per hour |
| 10−3 | 1 millihertz (mHz) | ||
| 10−2 | 1 centihertz (cHz) | ~16.667 mHz | One rpm |
| 10−1 | 1 decihertz (dHz) | ||
| 100 | 1 hertz | 1 to 1.66 Hz | approximate frequency of an adult human's resting heart beat |
| 1 Hz | 60 bpm, common tempos in music. | ||
| 2 Hz | 120 bpm, common tempos in music. | ||
| 101 | 1 decahertz (daHz) | 10 Hz | cyclic rate of a typical automobile engine at idle (equivalent to 600 rpm) |
| 12 Hz | acoustic — the lowest possible frequency that a human can hear | ||
| 27.5 Hz | acoustic — the lowest musical note (A) playable on a normally-tuned standard piano | ||
| 50 Hz | electromagnetic — standard AC mains power (European AC, Tokyo AC) | ||
| 60 Hz | electromagnetic — standard AC mains power (American AC, Osaka AC) | ||
| 102 | 1 hectohertz (hHz) | 100 Hz | cyclic rate of a typical automobile engine at redline (equivalent to 6000 rpm) |
| 261.626 Hz | acoustic — the musical note middle C | ||
| 440 Hz | acoustic — concert pitch (A above middle C), used for tuning musical instruments | ||
| 103 | 1 kilohertz (kHz) | 4.186 kHz | acoustic — the highest musical note (C8) playable on a normally-tuned standard piano |
| 8 kHz | ISDN sampling rate | ||
| 104 | 10 kHz | 14 kHz | acoustic — the upper limit of human hearing |
| 17.4 kHz | acoustic — a frequency known as The Mosquito, which is generally only audible to those under the age of 24. | ||
| 105 | 100 kHz | 740 kHz | the clock speed of the world's first commercial microprocessor, the Intel 4004 (1971) |
| 106 | 1 megahertz (MHz) | 530 kHz to 1.710 MHz | electromagnetic — AM radio broadcasts |
| 1 MHz to 8 MHz | clock speeds of early home/personal computers (mid-1970s to mid-1980s) | ||
| 107 | 10 MHz | 13.56 MHz | electromagnetic — Near field communication |
| 108 | 100 MHz | 88 MHz to 108 MHz | electromagnetic — FM radio broadcasts |
| 902 to 928 MHz | electromagnetic — common cordless telephone frequency in the US | ||
| 109 | 1 gigahertz (GHz) | 1.42 GHz | electromagnetic — the hyperfine transition of hydrogen, also known as the hydrogen line or 21 cm line |
| 2.4 GHz | electromagnetic — microwave ovens, Wireless LANs and cordless phones (starting in 1998). | ||
| 3.8 GHz | highest clock speed Pentium 4 "Prescott" microprocessor (2005) | ||
| 5.8 GHz | electromagnetic — cordless phone frequency introduced in 2003 | ||
| 1010 | 10 GHz | 3 GHz to 30 GHz | electromagnetic — super high frequency |
| 1011 | 100 GHz | 160.2 GHz | electromagnetic — peak of cosmic microwave background radiation |
| 845 GHz | fastest transistor (Dec. 2006). | ||
| 1012 | 1 terahertz THz | ||
| 1013 | 10 THz | 21 THz to 33 THz | electromagnetic — infrared light used in thermal imaging, for example for night vision |
| 1014 | 100 THz | 428 THz to 750 THz | electromagnetic — visible light, from red to violet |
| 1015 | 1 petahertz PHz | 2.47 PHz | electromagnetic — Lyman-alpha line |
| 1016 | 10 PHz | 30 PHz | electromagnetic — x-rays |
| 1017 | 100 PHz | ||
| 1018 | 1 exahertz EHz | ||
| 1019 | 10 EHz | ||
| 1020 | 100 EHz | 300 EHz + | electromagnetic — gamma rays |
| 1024 | 262×1024 Hz | The frequency of heat which causes uranium to fission | |
| 1043 | 1.85×1043 Hz | Planck frequency, the inverse of the Planck time |
Famous quotes containing the words orders and/or magnitude:
“Punishment may make us obey the orders we are given, but at best it will only teach an obedience to authority, not a self-control which enhances our self-respect.”
—Bruno Bettelheim (20th century)
“My time has come.
There are twenty people in my belly,
there is a magnitude of wings,
there are forty eyes shooting like arrows,
and they will all be born.
All be born in the yellow wind.”
—Anne Sexton (1928–1974)