If "Path difference" between two sounds is an integral multiple of wavelength, then _ occurs:
Correct answer: A. Constructive interference
- A. Constructive interference
- B. Destructive interference
- C. Different frequency range
- D. None of these
Explanation
Constructive interference occurs when the path difference between two sounds is an integral multiple of the wavelength because the waves align in-phase, resulting in reinforcement. Destructive interference, on the other hand, occurs when the path difference is an odd integral multiple of half wavelength, causing the waves to cancel each other out. The option of a different frequency range is irrelevant in this context. Therefore, the correct answer is option A, constructive interference.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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