What is the effect on the interference fringes in a young's double slit experiment if?
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question_answer What is the effect on the interference fringes in a Young's double-slit experiment due to each of the following operations : (a) The screen is moved away from the plane of the slits. (b) The (monochromatic) source is replaced by another (monochromatic) source of shorter wavelength.
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a) When screen is moved away, D increases. therefore width of the fringes increases. However, angular separation (λ/d) remains the same. ∴ β decreases i.e., fringe width decreases.
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