Problem Statement: Transmission and Antenna Systems Radiation and Wave Propagation Problem Solving A VHF radio is to be established via the ionosphere. Assuming the earth is flat with a critical frequency of 5 MHz, the angle of elevation is 45 degrees. Calculate the optimum working frequency. a. 8 MHz b. 5 MHz c. 6 MHz d. 56 MHz Problem Answer: The optimum working frequency of the VHF radio is equal to 6 MHz. More Questions in: Radiation and Wave Propagation Problem Series of Online Questions and Answers in Radiation and Wave Propagation MORE ON: Questions and Answers in Radiation and