Question

Identify the polarisation of the wave given, Ex = 2 cos wt and Ey = sin wt. The phase difference is -90^0. (a) Left hand circularly polarised (b) Right hand circularly polarised (c) Left hand elliptically polarised (d) Right hand elliptically polarised This question was posed to me at a job interview. My question is taken from Types of Polarization in division 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 (d) Right hand elliptically polarised The best explanation: The magnitude of the Ex and Ey components are not same. Thus it is elliptical polarisation. For -90 phase difference, the polarisation is right handed. In other words, the rotation is in anti-clockwise direction. Thus the polarisation is right hand elliptical.