Exam Questions Papers - Engineering

Q1:

A uniform plane wave in the free space is normally incident on an infinitely thick dielectric slab (dielectric constant εr = 9). The magnitude of the reflection coefficient is

A 0

B 0.3

C 0.5

D 0.8

ANS:C - 0.5

Thus reflection coefficient = = - 0.5 Thus magnitude is 0.5 .