Instructions:

• The two sources can be dragged to vary the separation.
• The wavelength can be changed with the slider.
• To build the interference pattern, press "Play."notice the bright parts where the light from the two sources arrives with the same phase, dark where the phases are opposite.
• Check how the scale of the pattern varies with different colors, and with different source separation.

(Note that this is a very tiny apparatus!)

For Full Screen Flashlet, click here.