A string of length 0.4 m and mass 
is tightly clamped at its ends. The tension in the string is 1.6 N. Identical wave pulses are produced at one end at equal intervals of time Δ Δ t. The minimum value of Δ Δ t which allows constructive interference between successive pulses is
Text Solution
Verified by ExpertsB
When a wave pulse is reflected from other end, it suffers a phase change of 
radians.
The speed of transverse wave in a flexible stretched string depends upon the tension 
in the string and the mass per unit length 
as
Putting the numerical values from the question,
We know that when pulse is reflected from the other end, it suffers a phase change of 
. Again when the reflection takes place from first end, a phase change of 
in addition occurs. Therefore, after successive reflections same wave pulse is obtained as previous. If at this instant another same wave pulse is obtained, then these two wave pulses produce constructive interference.
Hence, for constructive interference between successive pulses
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems