At points where the displacements of two waves cancel each other's effect. the path difference is an odd integral multiple of half the wavelength. This effect is known as:
Correct answer: B. Destructive interference
- A. Constructive interference
- B. Destructive interference
- C. Stationary interference
- D. Simple interference
Explanation
Destructive interference at a point between the two waves takes place if the path difference between the waves at that point is equal to odd integral multiple of half wavelength of the wave.So, path difference Δx=(n+1/2)λWhere n must be an integer.
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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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