Question

If ε₀ and μ₀ are the electric permittivity and
magnetic permeability in vacuum, ε and μ are
corresponding quantities in medium, then
refractive index of the medium is
(a) ⎷ ε (b) ⎷ ε₀μ
ε₀ εμ₀
(c) ⎷ε₀μ₀ (d) ⎷ εμ
εμ ε₀μ₀

Answer 1

Answer:

Let velocity of light in medium and in air be  v and c, respectively.

Refractive index of medium      n=vc                    where v=μϵ1

∴      n=1/ϵμ1/ϵoμo=μoϵoμϵ