The range of radio frequencies for communication through free space is which of the following?(a) Few hundreds of Hz to a few kHz(b) Few hundreds of MHz to a few GHz(c) Few hundreds of kHz to a few GHz(d) Few hundreds of Hz to a few thousands kHzThe question was posed to me during an online interview.I'm obligated to ask this question of Communication Systems in division Communication Systems of Physics – Class 12

The range of radio frequencies for communication through free space is

1.	The range of radio frequencies for communication through free space is which of the following?(a) Few hundreds of Hz to a few kHz(b) Few hundreds of MHz to a few GHz(c) Few hundreds of kHz to a few GHz(d) Few hundreds of Hz to a few thousands kHzThe question was posed to me during an online interview.I'm obligated to ask this question of Communication Systems in division Communication Systems of Physics – Class 12
Answer» Right option is (C) Few HUNDREDS of kHz to a few GHz The explanation: Communication through free space using radio WAVES TAKES place over a very wide range of FREQUENCIES, i.e. from a few hundreds of Hz to a few kHz. This range of frequencies is further subdivided and allocated for various services.

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