When light propagates through a material medium of relative permittivity ε r and relative permeability μ r, the velocity of light, v is given by (c-velocity of light in vacuum) (a) v = c (b) v = √((μr)/(εr)) (c) v = √((εr)/(μr)) (d) v = (c)/(√(εr μr))

Answer: (d). v = (1)/(√(με)) = (1)/(√(μ₀ε₀)√(μrεr)). (1)/(√(μ₀ε₀)) = c. So the answer is (d) v = (c)/(√(εrμr)).

When light propagates through a material medium of relative… | NEET 2022 (Phase 1)

Q11NEET 2022 · PHASE 1Easy

Speed of EM Waves in a Medium

When light propagates through a material medium of relative permittivity $\varepsilon$ r and relative permeability $\mu$ r, the velocity of light, v is given by (c-velocity of light in vacuum)

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Answer: (d)

$v = \dfrac{1}{\sqrt{\mu\varepsilon}} = \dfrac{1}{\sqrt{\mu_0\varepsilon_0}\sqrt{\mu_r\varepsilon_r}}$ .
$\dfrac{1}{\sqrt{\mu_0\varepsilon_0}} = c$ .
So the answer is (d) $v = \dfrac{c}{\sqrt{\varepsilon_r\mu_r}}$ .

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Speed of EM Waves in a Medium question from NEET 2022 (Phase 1)

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