Sound waves of wavelength $0.75\,\text{m}$ are produced in phase by two loudspeakers X and Y. As illustrated, an observer O can move to any position on a straight line through X and Y. O is located at a point where the waves arriving from X and Y are in phase. What could the distances OY and XY be?
- Adistance OY $= 1.25\,\text{m}$, distance XY $= 3.50\,\text{m}$
- Bdistance OY $= 2.00\,\text{m}$, distance XY $= 2.75\,\text{m}$
- Cdistance OY $= 2.75\,\text{m}$, distance XY $= 2.00\,\text{m}$
- Ddistance OY $= 3.25\,\text{m}$, distance XY $= 1.50\,\text{m}$