In a Young's double-slit experiment, the screen is moved away from the plane of the slits. What will be its effect on the following? (i) Angular separation of the fringes. (ii) Fringe-width.

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Correct answer: c) (i) remains constant, but (ii) increases.. In Young’s double-slit experiment (Y.D.S.E.), Fringe width (β): ​ where = wavelength of light, = distance between slits and screen, = distance between the two slits. Angular separation (θ): ​ Now: If the screen is moved away, increases. (i) Angular separation (θ) = ​ → independent of D, so remains constant. (ii) Fringe width (β) = → directly proportional to D, so increases. ✅ Correct Answer: ​

In a Young's double-slit experiment, the screen is moved away from the plane of the slits. What will be its effect on th…

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