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1. |
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: |
A. | 1.5 |
B. | \(\sqrt {1.5} \) |
C. | 2 |
D. | √2 |
Answer» D. √2 | |