In a YDSE (young double slit experiment) screen is placed 1 m from the slits wavelength of light used is 6000 Å. Fringes formed on the screen are observed by a student sitting close to the slits. The student's eye can distinguish two neighboring fringes, if they subtend an angle more than 1 minutes of arc. Calculate the maximum distance between the slits, so that fringes are clearly visible. (give are in mm).
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Ans. 0002
Sol. Angular fringe width θ β = 
= 
According to the given condition
≥ 
d < 
d max = 2.06 × 10 –3 m
d max = 2.06 mm
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