railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Electromagnetic Wave Propagation Plane Wave At Oblique Incidence
A uniform plane wave in air impinge at 45° angle on a lossless dielectric material with dielectric constant εr. The transmitted wave propagates at a 30° direction with respect to the normal. The value of ϵr is:
1
1.5
2
\(\sqrt {1.5} \)
3
2
4
√2