Question

Electromagnetic waves travel in a medium which has relative permeability `1.3` and relative permittivity `2.14`. Then the speed of the electromagnetic wave in the medium will be
A. `1.36xx10^(6)m//s`
B. `1.8xx10^(2)m//s`
C. `3.6xx10^(8)m//s`
D. `1.8xx10^(8)m//s`

Answer 1

Correct Answer - d
`v=(c)/(sqrt(mu_(e)epsilon_(r)))=(3xx10^(8))/(sqrt(1.3xx2.14))=1.8xx10^(8)m//sec`