Interference animations

One animated wave:

A two-dimensional, circular wave, depicted by gray scale.

Two animated waves, zero spacing:

Addition of waves is by direct superposition. For two identical waves, the result is simply a doubling of the amplitudes at all times and places.

Two animated waves, one wavelength spacing:

Offset waves interfere, resulting in alternating nodes (directions in which the waves cancel completely) and antinodes (directions in which the waves add constructively).

Two animated waves, Two wavelength spacing:

The pattern of nodes depends on the wave spacing: more nodes for wider spacing.

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