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Physics · PYQ NEET UG 2019(2)
हिन्दीFor a transparent medium, relative permeability and permittivity, \( \mu_r \) and \( \varepsilon_r \) are \( 1.0 \) and \( 1.44 \) respectively. The velocity of light in this medium would be,
Correct answer · Option 2
\( 2.5 \times 10^8\text{ m/s} \)
Explanation
Velocity \( v = \frac{c}{\sqrt{\mu_r \varepsilon_r}} = \frac{3 \times 10^8}{\sqrt{1.0 \times 1.44}} = \frac{3 \times 10^8}{1.2} = 2.5 \times 10^8\text{ m/s} \).
