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Physics · PYQ NEET UG 2022
हिन्दीWhen light propagates through a material medium of relative permittivity \( \in_r \) and relative permeability \( \mu_r \), the velocity of light, \( \nu \) is given by: (\( c \) – velocity of light in vacuum)
Correct answer · Option 2
\( \nu = \frac{c}{\sqrt{\in_r \mu_r}} \)
Explanation
Velocity of light in a medium is given by \( \nu = \frac{1}{\sqrt{\mu \in}} = \frac{1}{\sqrt{\mu_0 \mu_r \in_0 \in_r}} = \frac{c}{\sqrt{\mu_r \in_r}} \).
