2 Applications of different frequency spectrum?

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 Applications of different frequency spectrum? 


ELF    EXTREME LOW FREQUENCY

VF       VOICE FREQUENCY

VLF     VERY LOW FREQUENCY

LF        LOW FREQUENCY

MF       MEDIUM FREQUENCY

HF        HIGH FREQUENCY

VHF     VERY HIGH FREQUENCY

UHF     ULTRA HIGH FREQUENCY

SHF      SUPER HIGH FREQUENCY

EHF     EXTREME HIGH FREQUENCY

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