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A medium of relative permittivity r2 = 2 form an interface...

This question belongs to Electronics And Communications Engineering Electromagnetic Field Theory
Electromagnetic Field Theory
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A medium of relative permittivity εr2 = 2 form an interface with free-space. A point source of electromagnetic energy is located in the medium at depth of 1 meter from the interface. Due to the total internal reflection, the transmitted beam has a circular cross-section over the interface. The area of the beam cross-section at the interface is given by

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Correct Answer: Option D
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