The diagram depicts a string held taut between the fixed points X and Y. A stationary wave is present on the string. The solid line indicates the string when its displacement is greatest at time $t_0$. The dashed line indicates the alternative position of greatest displacement. The straight dashed line in the middle represents the mean position of the string. Point S on the string is vertically above point P. Point T on the string is vertically below point Q. Which statement is correct?
- AA short time after $t_0$, point R on the string will be displaced.
- BA short time after $t_0$, points S and T on the string move in opposite directions.
- CThe distance between P and Q is one wavelength.
- DTwo moving points on the string that are equal distances from point R vibrate in phase.