|
A. |
A and C |
|
To
be in phase the points must be the same height and be moving in the same
direction.
The easiest way to determine if the same
motion is to consider the wave as a rollercoster.
The car is going up at points A, B, E, and F
The car is going down at points C, D, and G
The following points are in phase
A and E; C and G; B and F
The Correct Answer is B. |
