An electromagnetic wave travel in a medium with a speed of 2 10^8 ~ms ⁻¹ . The relative permeability of the medium is 1 . Then the relative permitivity is

Step-by-step solution

For EM wave, v=2 10^8 ~ms ⁻¹, _ r =1 aligned & v= 1 = ( 1 _ o _ o ) ( 1 _ r _ r )= c _ r _ r & 2 10^8= 3 10^8 1 _ r _ r = ( 3 2 )^2=2.25 aligned