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EM_field.md

Table 1. Wavelength $\lambda$ in meters $m$ and frequency bands $f$ in hertz $Hz$ (cycle per second $s$), where $f=\frac{v}{\lambda}$ of (1) electromagnetic radiation EMR1, with $v_e=c=299792458 \frac{m}{s}$ of the electromagnetic field EMF2 and (2) sound3, with $v_s=340.3 \frac{m}{s}$ in comparison.

					f						l				(1)							abr		l			(2)
					from	to				from	to											from	to		

Sound/						3		Hz															3		km	Infrasound
Long waves			3		30		Hz		100		10	Mm	Extremely low frequency		ELF				
					30		300		Hz		10		1	Mm	Super low frequency			SLF		21		m	((Sound))
					300		3000	Hz		1000	100	km	Ultra low frequency			ULF				
					3		30		kHz		100		10	km	Very low frequency			VLF		17		mm	Ultrasound
					30		300		kHz		10		1	km	Low frequency				LF				
					300		3000	kHz		1000	100	m	Medium frequency			MF				

Radar, Radio, TV	3		30		MHz		100		10	m	High frequency				HF				
					30		300		MHz		10		1	m	Very high frequency			VHF				

Microwave			300		3000	MHz		1000	100	mm	Ultra high frequency		UHF		213		nm	Hypersound
					3		30		GHz		100		10	mm	Super high frequency		SHF				
					30		300		GHz		10		1	mm	Extremely high frequency	EHF				

Thermal Infrared	300		3000	GHz		1000	100	mm	Tremendously high frequency	THF				
					0,3		20		THz		1000	15	mm	Far-infrared				FIR				

Infrared			20		37		THz		15		8	mm	Long-wavelength infrared	MIR				
					37		100		THz		8		3	mm	Mid-wavelength infrared					
					100		214		THz		3		1,4	mm	Short-wavelength infrared					
					214		400		THz		1400	750	nm	Near-infrared				NIR				

Visible light		400		480		THz		750		625	nm	Red							
					480		510		THz		625		590	nm	Orange					
					510		530		THz		590		565	nm	Yellow					
					530		600		THz		565		500	nm	Green						[[Light]]				
					600		620		THz		500		485	nm	Cyan					
					620		670		THz		485		450	nm	Blue					
					670		790		THz		450		380	nm	Violet					

Ultraviolet			790		952		THz		400		315	nm	Ultraviolet A				UV-A				
					952		1000	THz		315		280	nm	Ultraviolet B				UV-B				
					1		3		PHz		280		100	nm	Ultraviolet C				UV-C				

Ionizing radiation	3		30		PHz		121		10	nm	Extreme ultraviolet			E-UV				
					30		3000	PHz		10		0,1	nm	Soft X-rays					SX				
					3		30		EHz		100		10	pm	Hard X-rays					HX				
					30				EHz		10			pm	Gamma rays					Y

Table 2. Metric Prefixes (CGPM, 2022; NIST, 2024).

factor												m						m/Hz	

10											1E-01	d	deci		1E+01	da	deca
100											1E-02	c	centi		1E+02	h	hecto
						
1 000 										1E-03	m	milli		1E+03	k	kilo
1 000 000 									1E-06	m	micro		1E+06	M	Mega
1 000 000 000 								1E-09	n	nano		1E+09	G	Giga
1 000 000 000 000 							1E-12	p	pico		1E+12	T	Tera
1 000 000 000 000 000 						1E-15	f	femto		1E+15	P	Peta
1 000 000 000 000 000 000 					1E-18	a	atto		1E+18	E	Exa
						
1 000 000 000 000 000 000 000 				1E-21	z	zepto		1E+21	Z	Zetta
1 000 000 000 000 000 000 000 000 			1E-24	y	yocto		1E+24	Y	Yotta
1 000 000 000 000 000 000 000 000 000 		1E-27	r	ronto		1E+27	R	Ronna
1 000 000 000 000 000 000 000 000 000 000 	1E-30	q	quecto		1E+30	Q	Quetta

References

CGPM. (2022). Sur l’extension de La Liste Des Préfixes Du SI. Résolution 3 de La 27e. Paris, France: La Conférence générale des poids et mesures (CGPM). https://doi.org/10.59161/CGPM2022RES3F

NIST. (2024). Metric (SI) Prefixes. Gaithersburg, Maryland, U.S.: National Institute of Standards; Technology (NIST). https://www.nist.gov/pml/owm/metric-si-prefixes

Footnotes

  1. a self-propagating wave of the electromagnetic field itself, requiring no medium for propagation. ↩

  2. a physical field that represents the influences generated by or acting on electrical charges, a combination of an electric and a magnetic field. ↩

  3. a vibration that propagates in a medium (gas, liquid or solid). ↩