The intrinsic impedance of free space is approximately?

  • A50 ohm
  • B75 ohm
  • C120 pi ohm
  • D600 ohm
Report an error
Correct Answer: C. 120 pi ohm
Explanation: η0=sqrt(mu0/epsilon0)=120π ohm, approximately 377 ohm.
Reference: Standard electromagnetic theory: em wave fundamentals