Two speakers connected to the same source of fixed frequency are placed 2m apart in a box.A sensitive microphone placed at a distance of 4m from their midpoint along the perpendicular bisector shows maximum response.
The box is slowly rotated until the speakers are in line with the microphone.The distance between the midpoint of the speakers and the microphone remains unchanged.Exactly 5 maximum responses are observed in the microphone in doing this.
The wavelength of the soundwave is,
1. 0.4m 2. 0.8m 3. 1m 4. 0.2m 5. 0.6m ans: 0.4m
v=f[tex]\lambda[/tex] I think
The Attempt at a Solution
First of all, I don't quite understand the question, especially the part where they mention the change in response.The frequency is a constant,so I think [tex]\lambda[/tex] is also a constant but the number of loops maybe different.
Then again do the 5 maximum responses mentioned here refer to beats heard?
I'm really confused.Any help would be much appraciated.