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)

Step-by-step solution

Speed of electromagnetic wave in vacuum: c = 1 ₀ ₀ Speed in a medium with permeability = 2 ₀ and dielectric constant k = 3 : v = 1 = 1 2 ₀ 3 ₀ = 1 6 ₀ ₀ v = 1 6 1 ₀ ₀ = c 6 Ratio of speeds: c v = 6 Therefore: c : v = 6 : 1