Register to reply

Interference wave...have solution need explanation

by Puchinita5
Tags: explanation, interference, solution, wavehave
Share this thread:
Puchinita5
#1
Jul31-09, 04:53 PM
P: 166
1. The problem statement, all variables and given/known data
In Fig. 17-35, sound with a 46.4 cm wavelength travels rightward from a source and through a tube that consists of a straight portion and a half-circle. Part of the sound wave travels through the half-circle and then rejoins the rest of the wave, which goes directly through the straight portion. This rejoining results in interference. What is the smallest radius r (cm) that results in an intensity minimum at the detector? (Take the speed of sound to be 343 m/s.)

2. Relevant equations

http://edugen.wiley.com/edugen/cours...pict_17_34.gif
3. The attempt at a solution

i have the solution...what i don't understand is WHY the path length difference equals 23.2??? don't see how or why it's half the wavelength???
Phys.Org News Partner Science news on Phys.org
Hoverbike drone project for air transport takes off
Earlier Stone Age artifacts found in Northern Cape of South Africa
Study reveals new characteristics of complex oxide surfaces
Hootenanny
#2
Jul31-09, 05:47 PM
Emeritus
Sci Advisor
PF Gold
Hootenanny's Avatar
P: 9,781
HINT: A minimum means that destructive interference has occured ...


Register to reply

Related Discussions
Wave interference Introductory Physics Homework 0
Stuck on ladder problem, know the solution but need an explanation Introductory Physics Homework 1
Wave Interference Introductory Physics Homework 0
Wave interference Introductory Physics Homework 3
X/0 and a possible explanation of a solution General Math 5