00:01
Hello, the question here is the main propagation phenomena in a conventional fiber is option a, total internal reflection, option b, brags reflection, option c, others.
00:16
So in a conventional optical fiber, the main phenomena of propagation of signal is through light, which happens due to total internal reflection.
00:27
That is, when we can see this input signal here, so when this input signal enters an optical fiber, when it touches the surface of the optical fiber, it will reflect and it will move to the other side.
00:43
Then again it gets reflected and so on it gets reflected till the output signal is reached at the other destination.
00:51
So the phenomena in the conventional fiber is total internal reflection.
00:57
So that is the answer for the first part of the question which is total internal reflection.
01:15
Now the second question states that if the input power and output power are approximately equal, the optical fiber is not good...