Diagram 1 illustrates a ripple tank experiment in which plane waves pass through a narrow slit in a metal sheet and are diffracted. Diagram 2 shows the same tank with a slit that is wider. For each case, the wave pattern arriving at the slit and the resulting pattern after the slit are displayed. Which change would make the waves in diagram 1 diffract less, producing an emergent pattern more like the one shown in diagram 2?
- Aincreasing the frequency of vibration of the bar
- Bincreasing the speed of the waves by making the water in the tank deeper
- Creducing the amplitude of vibration of the bar
- Dreducing the length of the vibrating bar