Interference, Refraction & Diffraction

Sound Cancellation

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The sound from two speakers destructively interferes.

Double Sound Source Interference

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Young's experiment performed with coherent sound waves from two loudspeakers.

[In-Depth Description]

Beats

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Two tuning forks with similar frequencies; one fork is variable in frequency to tune beating.

[In-Depth Description]

SEE ALSO
Ripple Tank Applet (select Setup:Two Sources and 2 Src, 2 Freq from the drop-down menus)

Mechanical Beating

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Shadow projection of the superposition of two circular motions exhibits beating phenomenon.

Double-source Interference

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Stationary spatial interference pattern from two point sources is displayed on OHP.

Comb Interference

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Spatial beats between two combs on OHP.

Ripple Tank Wave Phenomena

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Interference patterns of water waves generated by different sources at adjustable frequency.

[In-Depth Description]

SEE ALSO
Ripple Tank simulation

Lissajous Figures

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Summation of sinusoidal waves on oscilloscope in x-y mode.

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Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
Campus Location: Science Center B-08A | Tel: (617) 495-5824 | Email: scidemos-at-fas.harvard.edu