Explanation
Carrier frequency > audio frequency
A maximum frequency deviation of 75 kHz is permitted for commercial FM broadcast stations in the 88 to 108 MHz VHF band.
Carrier + signal → modulation.
VHF (Very High Frequency) band having frequency range 30 MHz to 300 MHz is typically used for TV and RADAR transmission.
Laser beams are perfectly parallel. So that they are very narrow and can travel a long distance without spreading. This is the feature of laser while they are monochromatic and coherent these arc characteristics only.
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