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The phenomenon employed in the waveguide operation is

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The phenomenon employed in the waveguide operation is

(a) Reflection

(b) Refraction

(c) Total internal reflection

(d) Adsorption

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Question is taken from Types of Waveguides topic in portion Waveguides of Electromagnetic Theory

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The correct choice is (c) Total internal reflection

Easiest explanation: The waveguides use total internal reflection phenomenon to transmit the waves passing through it. Thus the acceptance angle and critical angle are important for effective transmission.

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