MCQ Practice Question Electromagnetic TheoryWave Propagation A wave has wavelength 0.5 m. Its phase constant is approximately? A3.14 rad/m B6.28 rad/m C12.57 rad/m D25.13 rad/m Show AnswerHide AnswerReport an error Correct Answer: C. 12.57 rad/m Explanation: β=2π/λ=2π/0.5=4π≈12.57 rad/m.Reference: Standard electromagnetic theory: wave propagation