The condition for constructive interference of two coherent beams is that the path difference should be:
Correct answer: B. ntegral multiple of λ
- A. Integral multiple of λ /2
- B. ntegral multiple of λ
- C. Odd integral multiple of λ /2
- D. Even integral multiple of λ
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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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