Electromagnetic spectrum

Class				Freq- uency	Wave- length	Energy
Ionizing radiation	γ	Gamma rays		300 EHz	1 pm	1.24 MeV
				30 EHz	10 pm	124 keV
	HX	Hard X-rays
				3 EHz	100 pm	12.4 keV
	SX	Soft X-rays
				300 PHz	1 nm	1.24 keV
				30 PHz	10 nm	124 eV
	EUV	Extreme ultraviolet
				3 PHz	100 nm	12.4 eV
	NUV	Near ultraviolet
Visible				300 THz	1 μm	1.24 eV
	NIR	Near infrared
				30 THz	10 μm	124 meV
	MIR	Mid infrared
				3 THz	100 μm	12.4 meV
	FIR	Far infrared
				300 GHz	1 mm	1.24 meV
Micro- waves and radio waves	EHF	Extremely high frequency
				30 GHz	1 cm	124 μeV
	SHF	Super high frequency
				3 GHz	1 dm	12.4 μeV
	UHF	Ultra high frequency
				300 MHz	1 m	1.24 μeV
	VHF	Very high frequency
				30 MHz	10 m	124 neV
	HF	High frequency
				3 MHz	100 m	12.4 neV
	MF	Medium frequency
				300 kHz	1 km	1.24 neV
	LF	Low frequency
				30 kHz	10 km	124 peV
	VLF	Very low frequency
				3 kHz	100 km	12.4 peV
	ULF	Ultra low frequency
				300 Hz	1 Mm	1.24 peV
	SLF	Super low frequency
				30 Hz	10 Mm	124 feV
	ELF	Extremely low frequency
				3 Hz	100 Mm	12.4 feV
Sources: File:Light spectrum.svg
Legend
γ = Gamma rays MIR = Mid infrared HF = High freq. HX = Hard X-rays FIR = Far infrared MF = Medium freq. SX = Soft X-rays Radio waves LF = Low freq. EUV = Extreme ultraviolet EHF = Extremely high freq. VLF = Very low freq. NUV = Near ultraviolet SHF = Super high freq. VF/ULF = Voice freq. Visible light UHF = Ultra high freq. SLF = Super low freq. NIR = Near Infrared VHF = Very high freq. ELF = Extremely low freq. Freq = Frequency

The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies.