MCQ Practice Question Electromagnetic TheoryEM Wave Fundamentals A free-space electromagnetic wave has frequency 100 MHz. Its wavelength is approximately? A0.3 m B3 m C30 m D300 m Show AnswerHide AnswerReport an error Correct Answer: B. 3 m Explanation: λ=c/f=(3×10^8)/(100×10^6)=3 m.Reference: Standard electromagnetic theory: em wave fundamentals