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Describe an experiment to explain the phenomenon of interferece ofwaves ? |
Answer» Solution :Let US consider a SIMPLE instruement to demonstrate the interference of sound waves as shown in figure.  A sound wave from a loudspekar S is passed through the tube P. this looks like a T-shaped junction. In this case, half of the sound energy is sent in one DIRECTION and ther remaining half is sent in the OPPOSITE direction. Hence half is sent in the opposite directions. Hence, the sound waves that reach the receiver R can travel along either of twopaths. Thee distance covered by the sound wave along any path from the speaker to receiver is called the path length. From the above figure, iti is noticed that the lower path length is FIXED but the upper path length can be varied by sliding the upper tube i.e., varied. The difference in path length is known as path difference, `Delta r=|r_(2)-r_(1)|` |
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