Question
A plane electromagnetic wave travels in a medium of relative permeability 1.61 and relative permittivity 6.44. If magnitude of magnetic intensity is 4.5 $\times$ 10$-$2 Am$-$1 at a point, what will be the approximate magnitude of electric field intensity at that point?
(Given : Permeability of free space $\mu$0 = 4$\pi$ $\times$ 10$-$7 NA$-$2, speed of light in vacuum c = 3 $\times$ 108 ms$-$1)