Electromagnetic Field Theory - Engineering

Q1:

When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .

A reflection

B refraction

C transmission

D none of the above

ANS:B - refraction

It is total internal refraction only because refraction in the sense wave travels from less dense medium to more denser medium. Whereas reflection means it totally reflected back into the same medium. Which means it doesn't pass into another medium.