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The requirement of transmitting microwav...

The requirement of transmitting microwaves from one position to another on the earth is that

A

the transmitting and receiving antennas must be in line of sight.

B

the satellite remains fixed at a point w.r.t. the earth.

C

wavelength of e.m. waves must be `10^-6 m`

D

frequency of e.m. waves must be `10^-6` Hz.

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