Physics - Sound Wave Question with Solution | TestHub
Statement-1: For two coherent sound sources, constructive interference occurs at a point if the path difference between the waves reaching that point is an integral multiple of the wavelength.
Statement-2: If two sound waves from coherent sources interfere destructively, the resultant intensity at that point is always zero.
Options:
Answer:
Solution:
Statement-1 is true. For constructive interference, the waves must arrive in phase, which occurs when the path difference , where .
Statement-2 is false. Destructive interference means the waves are out of phase, leading to minimum intensity. However, the resultant intensity is zero only if the amplitudes of the interfering waves are equal. If the amplitudes are different, the resultant intensity will be minimum but non-zero.
