A medium of relative permittivity εr2 = 2 forms an interface with free space. A point source of EM energy is located in the medium at a 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-A- .symbol { font family: symbol; } 2p m2B- .symbol { font family: symbol; } p2 m2C- m2D- .symbol { font family: symbol; } p m2-D- .symbol { font family: symbol; } p m2

Question

A medium of relative permittivity &epsilon;r2 = 2 forms an interface with free space. A point source of EM energy is located in the medium at a 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-A- .symbol { font family: symbol; } 2p m2B- .symbol { font family: symbol; } p2 m2C- m2D- .symbol { font family: symbol; } p m2-D- .symbol { font family: symbol; } p m2

APTITUDE CRACK · Accepted Answer

The correct option is  D  .symbol { font family: symbol; } p m2

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