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Reflection & Transmission MCQs

Practice Reflection & Transmission MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Electromagnetic TheoryReflection & Transmission

The reflection coefficient for electric-field amplitude at normal incidence is defined as?

  • AReflected electric-field amplitude divided by incident electric-field amplitude
  • BIncident field divided by reflected field
  • CTransmitted power divided by incident power only
  • DReflected magnetic field multiplied by incident field
Report an error
Correct Answer: A. Reflected electric-field amplitude divided by incident electric-field amplitude
Explanation: The electric-field reflection coefficient is Γ=Er/Ei at the interface.
Reference: Standard electromagnetic theory: reflection & transmission
Question 2
Electromagnetic TheoryReflection & Transmission

If a wave is incident normally from a medium of intrinsic impedance eta1 onto a medium of impedance eta2, the electric-field reflection coefficient is?

  • A(eta2-eta1)/(eta2+eta1)
  • B(eta2+eta1)/(eta2-eta1)
  • Ceta1/eta2
  • Deta1+eta2
Report an error
Correct Answer: A. (eta2-eta1)/(eta2+eta1)
Explanation: Applying tangential E and H boundary conditions gives Γ=(η2-η1)/(η2+η1).
Reference: Standard electromagnetic theory: reflection & transmission