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दो धवनि तरंगे ही स्त्रोत द्वारा उत्पन की जाती है और अलग अलग रास्तो पर चलकर एक जगह मिलती है यदि स्त्रोत की कंपन की आवर्ती 1.0 kHz हो और एक रास्ता दुस्तरे से 83 cm लम्बा हो तो वियतिकरण किस प्रकार को होगा हवा में धवनि की चल =332 m/s

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तरंगदैर्ध्य `lambda=(v)/(v)=(332 m/s).(1.0xx10^(3) Hz)=33.2` cm
वियतीकरण के समाय दोनों तरंगो के बीच कलांतर
`delta =(2pi)/(lambda) triangle x =(23pi)/(33.2 cm)xx83 cm =2pi xx2.5=5pi`
यह `pi` का विषम गुणक है अतः यह विनाशी वियतीकरण है

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