Electromagnetic Frequency Spectrum
| Frequency (Wavelength) |
 |
Name |
| 0 Hertz |
|
Steady direct current |
| 15-20,000 Hz |
|
Audio frequencies |
| 30-15,000 Hz |
|
Normal human hearing range |
| 16-4186.01 Hz |
|
Standard musical scales |
| Note: – Audio is mechanical not electromagnetic |
|
|
| 3-30 Hz (100-10Mm) |
|
e.l.f. – Extremely Low Frequency |
| 30-300 Hz (10-1Mm) |
|
u.l.f. – Ultra Low Frequency |
| 3-30 kHz (100,000-10,000m) |
|
v.l.f. – Very Low Frequency |
| 10-16 kHz |
|
ultrasonic |
| 30 kHz to 30,000 MHz |
|
Radio Frequencies |
| 30-300 kHz (10,000-1000m) |
|
l.f. – low frequencies |
| 30-535 kHz |
|
Marine com & navigation, aero n |
| 300-3000 kHz (1000-100m) |
|
m.f. – medium frequencies |
| 535-1705 kHz |
|
AM broadcast bands |
| 1800-2000 kHz |
|
Amateur band, 160 meter |
| 3-30 MHz (100-10m) |
|
h.f. – high frequencies |
| 3.5-4 MHz |
|
Amateur band, 80 meter |
| 7-7.3 MHz |
|
Amateur band, 40 meter |
| 10.100-10.150 MHz |
|
Amateur band, 30 meter |
| 14.1-14.35 MHz |
|
Amateur band, 20 meter |
| 18.068-18.168 MHz |
|
Amateur band, 17 meter |
| 21-21.45 MHz |
|
Amateur band, 15 meter |
| 26.95-27.54 MHz |
|
Industrial, scientific, & medical |
| Industrial, scientific, & medical |
|
Amateur band, 12 meter |
| 28-29.7 MHz |
|
Amateur band, 10 meter |
| 26.965-27.405 MHz |
|
Citizens Band (Class D) |
| 30-300 MHz (10-1m) |
|
v.h.f. – very high frequencies |
| 30-50 MHz |
|
Police, fire, forest, highway, railroad |
| 50-54 MHz |
|
Amateur band, 6 meter |
| 54-72 MHz |
|
TV channels 2 to 4 |
| 72-76 MHz |
|
Government, Aero. Marker 75MHz |
| 76-88 MHz |
|
TV channels 5 and 6 |
| 88-108 MHz |
|
FM broadcast band |
| 108-117.95 MHz |
|
Aeronautical navigation |
| 118-135.95 MHz |
|
Civil Aviation Communication Band |
| 148-174 MHz |
|
Government |
| 144-148 MHz |
|
Amateur band, 2 meter |
| 174-216 MHz |
|
TV channels 7 to 13 |
| 216-470 MHz |
|
Amateur, government, CB Band, non-government, fixed or mobile aeronautical navigation |
| 220-225 MHz |
|
Amateur band, 1-1/4 meter |
| 225-400 MHz |
|
Military |
| 420-450 MHz |
|
Amateur band, 0.7 meter |
| 462.55-563.20 MHz |
|
Citizens Band (Class A) |
| 300-300 MHz (100-10cm) |
|
u.h.f. – ultra high frequencies |
| 470-806 MHz |
|
TV channels 14 to 69 |
| 806-890 MHz |
|
Cellular telephone |
| 890-3000 MHz |
|
Aero navigation, amateur bands, government & non-government, ixed and mobile |
| 1300-1600 MHz |
|
Radar band |
| 3000-30,000 MHz (10-1cm) |
|
s.h.f. – super high frequencies
Government and non-government, amateur bands, radio navigation |
| 30,000 MHz to 300 GHZ (1-0.1cm) |
|
Extra-high frequencies (weather radar, experimental, government) |
| 30-0.76 :m |
|
Infrared light and heat |
| 0.76-0.39 :m |
|
Visible light |
| 6470-7000 �ngstroms |
|
Red light |
| 5850-6740 �ngstroms |
|
Steady direct current |
| 15-20,000 Hz |
|
Yellow light |
| 5560-5750 �ngstroms |
|
Maximum visibility |
| 4912-5560 �ngstroms |
|
Green light |
| 4240-4912 �ngstroms |
|
Blue light |
| 4000-4240 �ngstroms |
|
Violet light |
| 0.39-0.032 :m |
|
Ultraviolet light |
| 0.032-0.00001 :m |
|
X-rays |
| 0.00001-0.0000006:m |
|
Gamma rays |
| 0.0005 �ngstroms |
|
Cosmic rays |
:m = micrometer 10^-6 m):� m = meter: cm = centimeter
Hz = hertz:� MHz = megahertz� (10^6 Hz):� kHz = kilohertz (10^3 Hz)
ghZ = GIGAHERTZ (10^9 Hz):��
1 �ngstrom = 10^-10 meters |
