| The
wave front is hitting at an angle.
Since part of the wave front is in Medium B
while the rest is in Medium A for the wave front that is both red and
blue, all points are not travelling at the same speed. B and C
are wrong.
For this same wave front, all of the points
are not in a straight line.
All points in a wave front must be in the same
phase.
The Correct Answer is A. |
