A transparent, non-magnetic medium has a dielectric constant of 2.25 . What is the speed of light in this medium? (Take the speed of light in vacuum as 3 10^8 m/s )

Step-by-step solution

For a non-magnetic medium, the relative permeability is approximately unity ( _r = 1 ). The speed of light in a material medium is given by the relation: v = c _r _r Substituting the given values ( _r = 2.25 , _r = 1 , c = 3 10^8 m/s ): v = 3 10^8 1 2.25 v = 3 10^8 1.5 = 2 10^8 m/s Answer: 2 10^8 m/s