The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k=3 and permeability of =2 _0, is ( _0= permeability of vacuum)

Question

Accepted Answer

Correct answer: D. (d) Speed of electromagnetic wave in vacuum: c= 1 _0ϵ_0 Speed in a medium with permeability =2 _0 and dielectric constant k=3 : v= 1 ϵ= 1 2 _0 3ϵ_0= 1 6 _0ϵ_0 v= 1 6 1 _0ϵ_0= c 6 Ratio of speeds: cv= 6 Therefore: c :v= 6 :1

$The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant k = 3 and permeability of μ = 2 μ_{0}, is (μ_{0} = permeability of vacuum)$

Solution

More Electromagnetic Waves PYQs