Speed of electromagnetic wave in a medium having relative permittivity \epsilon_r and relative permeability \mu_r is (speed of light in air, c=3 \times 10^8 {\m} \/ { s})

c \sqrt{\frac{\mu_r}{\epsilon_r}}

COMEDK Exam 2022 Solved Paper

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Speed of electromagnetic wave in a medium having relative permittivity εr and relative permeability µr is (speed of light in air, c=3×108m∕ s)

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