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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) 0.6I 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

Answer»

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.



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