Question

The wave impedance of free space is

• A. zero
• B. 376,6 $\Omega$
• C. 1883 $\Omega$
• D. 3776 $\Omega$

Answer 1

Answer: (B)

376,6 $\Omega$

Answer 2

In the case of a dielectric (where conductivity is zero) wave inpedance of free space $Z_0 = \sqrt{ \frac{ \mu }{ \varepsilon}}$ In fre space $\mu = 4 \pi \times 10^{ - 7 } \, H/ m \, and \, \varepsilon = 8.54 \times 10^{ - 12}$ F / m So, the value of wave impedance in free space, $Z_0 \simeq 377 \Omega$