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Identify the polarisation of the wave given, Ex = cos wt and Ey = sin wt. The phase difference is -90^0.

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Identify the polarisation of the wave given, Ex = 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

I have been asked this question during an online interview.

My question is taken from Types of Polarization topic in portion EM Wave Propagation of Electromagnetic Theory

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The correct option is (b) Right hand circularly polarised

To elaborate: The magnitude of the Ex and Ey components are the same. Thus it is circular 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 circular.

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