Problem Statement: Transmission and Antenna Systems Radiation and Wave Propagation Problem Solving What is the critical angle of the signal when it passes from glass, with a relative permittivity of 7.8, into air? a. 7.4° b. 5.2° c. 3.2° d. 51.2° Problem Answer: The critical angle of the signal when it passes from glass is equal to 7.4°. 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 Wave Propagation Online Questions and Answers in Communications Engineering per topic Series of Multiple Choice