state four factors affecting infrared communications

State two advantages of microwave communication over fiber communication.

Which statement about satellites is correct?(multiple choice questions)A.Passive satellites usually receive shorter wavelengths than resource satellitesb.Resource satellites are active satellitesc.Resource satellites are closer to the earth than communication satellites, in order to obtain high-resolution imagesD.Traditional communication satellites are geostationary satellites

Noise is added to a signal in a communication system a. At the receiving end b. At transmitting antenna c. In the channel d. During regeneration of the information