Intrinsic impedance of free space is given as
- A. 75 $\Omega$
- B. 73 $\Omega$
- C. 377 $\Omega$
- D. 300 $\Omega$
Answer: C. 377 $\Omega$
Explanation: Intrinsic impedance of free space $\eta_0 = \sqrt{\frac{\mu_0}{\epsilon_0}} \approx 120\pi \approx 377~\Omega$.