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Q. The wave impedance of free space is

CMC MedicalCMC Medical 2015

Solution:

In case of dielectric (conductivity = 0) wave impedance of free space $ {{Z}_{0}}=\sqrt{\frac{\mu }{{{\varepsilon }_{0}}}} $ For free space, $ \mu =4\pi \times {{10}^{-7}}H/m $ and $ {{\varepsilon }_{0}}=8.54\times {{10}^{-12}}F/m $ so, $ {{Z}_{0}}\simeq 377\,\Omega $