Question

The frequency in rad/sec of a wave with velocity of that of light and phase constant of 20 units is (in GHz) (a) 6 (b) 60 (c) 600 (d) 0.6 I got this question in an interview for internship. My question comes from Plane Waves in Dielectrics topic in portion EM Wave Propagation of Electromagnetic Theory Select the correct answer from above options Electromagnetic Theory questions and answers, Electromagnetic Theory questions pdf, Electromagnetic Theory question bank, Electromagnetic Theory questions and answers pdf, mcq on Electromagnetic Theory pdf,electromagnetic theory book pdf,electromagnetic theory pdf notes,electromagnetic theory lecture notes,electromagnetic theory of light,maxwell electromagnetic theory,electromagnetic theory proposed by,electromagnetic theory engineering physics,electromagnetic theory nptel

Answer 1

Right choice is (a) 6 The explanation: The velocity of a wave is given by V = ω/β. To get ω, put v = 3 x 10^8 and β = 20. Thus ω = vβ = 3 x 10^8^ x 20 = 60 x 10^8 = 6 GHz.