Electromagnetic Field Theory
In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include

Path diversity and frequency diversity
Amplitude timing and phase correction
Polarization shifting and code diversity
Antenna replacement and feed correction

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Electromagnetic Field Theory
Inside a hollow conducting sphere

 electric field is zero.
 electric field is a non zero constant.
 electric field changes with magnitude of the charge given to the conductor.
 electric field changes with distance from the center of the sphere.

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