Drag the screen and the circle to change their positions. The phasor diagram can also be moved by dragging on the lime-colored dot.
Red/blue are used to represent long/short wavelength for illustrative purpose only. The numerical values of the wavelength in this simulation do not in fact match with the actual wavelength of visible light.
The intensity graph is normalized so the peak intensity is always the same (in reality, as the number of slits increases, the peak intensity increases as well).
Calculations will appear here.