🔬 Procedure:

1. Start the Simulation: Click the "Start" button to begin the wave oscillation from the needle source.
2. Observe Wave Propagation: Watch as circular waves emanate from the oscillating needle and travel toward the wall with two slits.
3. Wave Diffraction: Notice how waves pass through both slits and spread out (diffract) on the other side.
4. Interference Pattern: Observe the interference pattern forming on the screen as waves from both slits overlap - bright bands appear where waves add up (constructive interference) and dark bands where they cancel (destructive interference).
5. Adjust Parameters: Use the sliders to modify wave frequency, amplitude, slit separation, and slit width to see how they affect the interference pattern.
6. View Intensity Graph: Click "Show Intensity Graph" to visualize the wave intensity distribution across the screen.
7. Reset: Use the "Reset" button to restart the simulation with default settings.