This applet allows you to visualize and study curves of constructive and destructive interference. You can change the distance b between the sources, as well as the wavelength λ. In these cases, the selected interference lines (actually curves) are hyperbolas. The resulting hyperbolic interference lines are mathematically modeled taking into account the principle that the path difference Δ must be less than the distance b between the sources. If Δ≥b, the triangle inequality would be violated, making it physically impossible to find a point that satisfies this condition and therefore rendering interference impossible.
