Interference in Wave Motion
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-203
2025-11-13
91
showing a transverse wave set up in a wire spring by a light blow. Just when the wave is reflected from the fixed end of the coil, strike a second blow: the direct and reflected waves will meet, and there will be some one part of the spring where the tendency of one wave to raise the spring will be exactly balanced by the tendency of the other wave to lower it.
This effect is called interference. Interference is a phenomenon attendant upon all wave motion, and arises from the fact that a medium that will transmit one wave motion will also transmit others at the same time. If the resultant of all the forces acting upon a particle at any time is zero, the result will be no motion, or interference. Interference in sound waves produces silence.
Demonstration. -Sound a tuning fork, -preferably one with a sounding box, as in Fig. 2,and move it rapidly toward, and then away from, a smooth wall. Observe the interferences that take place.
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