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NEET UG PHYSICS MCQ: WAVE OPTICS
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A beam of monochromatic light of wavelength falls normally on a glass wedge with the wedge angle of 20 second of an arc. If the refractive index of glass is find the number of dark interference fringes per of the wedge length:
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Correct option: B
5 per cm
Option B (5 per cm) is correct because the fringe width is calculated using the wedge angle and refractive index, then the number of fringes per cm is found.
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