Question

Identify the polarisation of the wave given, Ex = 2 cos wt and Ey = 2 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 addressed to me by my school principal while I was bunking the class.

I want to ask this question from Types of Polarization in division EM Wave Propagation of Electromagnetic Theory

Answer 1

The correct option is (a) Left hand circularly polarised

To explain: The magnitude of the Ex and Ey components are the same. Thus it is circular polarisation. For +90 phase difference, the polarisation is left handed. In other words, the rotation is in clockwise direction. Thus the polarisation is left hand circular.