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If the reflection co-efficient is ½ then emissivity is ___(a) 3/4(b) 1/4(c) 1/2(d) 3/2This question was posed to me by my school principal while I was bunking the class.I want to ask this question from Antenna Noise Temperature in division Antenna Parameters – II of Antennas

Answer»

The CORRECT OPTION is (a) 3/4

Explanation: Emissivity in TERMS of reflection coefficient is given by \(\epsilon=1-\mid\Gamma_s\mid^2=1-\frac{1}{4}=\frac{3}{4}.\)



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