7. Interference of Sound Waves

2011 Interference - 8
Confirm the constructive interference relation, n = d sinmax, by plotting sin max as a
function of the integer n. (Take values for n and max on the right side as positive and
those on the left as negative so your plot is a straight line (sin = -sin) rather than a
"V"). The slope of your best straight line will enable you to calculate /d, and then the
wavelength in terms of the measured distance, d, between the transmitters. Compare
this with the value of measured in part 4. Obviously the slope will also give you d/.
Thus you can find the separation d in terms of the theoretical wavelength = c/f.
Compare this with the value of d directly measured.