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H (A / m) – magnetic field strength
B (N / Am = Tesla = 10,000 gauss) – magnetic induction – magnetic flux density
Φ (Tm2 = Wb) – magnetic flux
L (H = W b / A) – inductance
Gauss is a unit of magnetic flux density.
For comparison, the conventional magnet used for pressing the paper has a constant magnetic flux density of 200 Gauss’s.
Electromagnetic spectrum – classification of biological frequency range (Hz)
0
0 – 300
300 – 104
104 – 109
109 – 1012
1012 – 4 x 1014
4 x 1014 – 7 x 1014
7 x 1014 – 1018
1018 – 1020
Over 102
One-way non-ionic currents – DC
Extremely low frequency non-ionizing – ELF
Low frequency non-ionizing – LF
Radio frequency non-ionizing – RF
Microwave radio radiation free range – MW
Infrared radiation free range – IR
Visible light weakly ionizing – VL
Ultraviolet weakly ionized range – UV
X-rays very ionization – XR
Gamma rays are very ionization – GR
The most significant biological effects of ionizing radiation from different sources with different wavelength and frequency, discovered in numerous epidemiological studies are given in the following table:
| Part of the spectrum | Source | Wavelength | Frequency | Biological Effects |
| Ultraviolet radiation UVA, UVB | Solar radiation | 318 – 400 nm | 750 – 950 THz | |
| Visible light | Lasers, Sunlight, Fire, LED, Bulbs | 400 – 780 nm | 385 – 750 THz |
|
| IR-A | Lasers, Remotes | 780 – 1.4 µm | 215 – 385 THz |
|
| IR-B | Lasers, Telecommunications | 1.4 – 3 µm | 100 – 215 THz |
|
| IR-C | Lasers, far IR range | 3 µm – 1 mm | 300 GHz – 100 THz |
|
| Microwaves | PCS phones, some cell phones, microwave ovens, cordless phones, motion detectors, radar, Wi-Fi | 1 mm – 33 cm | 1 – 300 GHz |
|
| Radio-frequency radiation | Mobile phonesi, TV, FM, AM, short wave, cordless phones | 33 cm – 3 km | 100 kHz – 1 GHz |
|
| Low-frequency RF | Transmission lines | > 3 km | < 100 kHz |
|
| Static fields [3] | Strong magnets, MRI | Infinitely | 0 Hz |
The division of the electromagnetic spectrum and frequency bands based on the arrangement and use of the various scientific disciplines.
