The figure below, two point sources S1 and S2, which are in phase, emit identica
ID: 1900119 • Letter: T
Question
The figure below, two point sources S1 and S2, which are in phase, emit identical sound waves of wavelength 2.0 m.(a) In terms of wavelengths, what is the phase difference between the waves arriving at point P if L1 = 38 m and L2 = 34 m?
0.6 wavelengths
1.5 wavelengths
2.0 wavelengths
3.2 wavelengths
(b) In terms of wavelengths, what is the phase difference between the waves arriving at point P if L1 = 39 m and L2 = 36 m?
1.5 wavelengths
2.0 wavelengths
2.3 wavelengths
1.6 wavelengths
(c) Assuming that the source separation is much smaller than L1 and L2, what type of interference occurs at P in situation (a).
fully destructive
fully constructive
(d) Assuming that the source separation is much smaller than L1 and L2, what type of interference occurs at P in situation (b).
fully constructive
fully destructive
Explanation / Answer
2.0 wavelengths