PhysicsJEE Main 23 Jan 2026, Shift 2·Q18·MCQ·Easy–moderate

Electromagnetic Waves · EM waves

The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant

k = 3

and permeability of

\mu = 2\mu_0

, is
(

\mu_0

= permeability of vacuum)

(1) $36:1$
(2) $3:2$
(3) $6:1$
(4) $\sqrt6:1$

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