전자기 스펙트럼 분류

Y  : Gamma-ray
HX : Hard X-Ray(경 X선)
SX : Soft X-Ray(연 X선)
EUV : Extremly UltraViolet
NUV : Near UltraViolet
NIR : Near InfraRed
MIR : Middle InfraRed
FIR : Far InfraRed

여기까지는 빛으로 불림
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여기서부터는 전자기파로 불림

EHF : Extremely High Frequency
SHF : Super High Frequency
UHF : Ultra High Frequency
VHF : Very High Frequency
HF  : High Frequency
MF  : Medium Frequency
LF  : Low Frequency
VLF : Very Low Frequency
VF  : Voice Frequency
ULF : Ultra Low Frequency
SLF : Super Low Frequency
ELF : Extremly Low Frequency