This animation demonstrates several superpositions of simple wave forms.
Basic operation:
The applet starts out running showing the interference of two sinusoidal waves.
The several checkboxes have obvious meanings. You can choose to see notes, wave 1, wave 2, and
the sum of both waves.
Click the 'Draw wave 1'
button. A rectangle will appear to the left. Drag your mouse through the
rectangle and draw a waveform.
Click the 'Draw wave 2' button. A rectangle will appear to the right. Drag your mouse through
this rectangle to draw the second waveform.
Click the 'Run' button and the hand drawn waves will be set into motion.
If you click the 'You'
button at the lower right, then you can drag your mouse across
the applet horizontally to slowly and carefully examine the interference.