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Understanding wave interference through sound experiments
interference Figure 12: A simple beat wave of amplitude ξ moving with velocity U (see text). damped waves Figure 2: Interference of two plane waves AB and CD with directions inclined at an angle α. The crests of CD are represented as C1D1, C2D2, etc., and the troughs are shown as broken lines (see text). examples of interference Figure 9: The Michelson interferometer. Figure 11: Multiple-beam interference. Lens L concentrates all beams at focus Q with the same phase differences they had prior to entering the lens. single-slit diffraction Young's double-slit experiment
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interference
Figure 12: A simple beat wave of amplitude ξ moving with velocity U (see text).
damped waves
Figure 2: Interference of two plane waves AB and CD with directions inclined at an angle α. The crests of CD are represented as C1D1, C2D2, etc., and the troughs are shown as broken lines (see text).
examples of interference
Figure 9: The Michelson interferometer.
Figure 11: Multiple-beam interference. Lens L concentrates all beams at focus Q with the same phase differences they had prior to entering the lens.
single-slit diffraction
Young's double-slit experiment
Understanding wave interference through sound experiments
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Key People

Fresnel, detail of an engraving by Ambroise Tardieu after a contemporary portrait, 1825
Augustin-Jean Fresnel
French physicist
Thomas Young, engraving
Thomas Young
British physician and physicist

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Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.
Physics and Natural Law