In young’s double slit experiment , the distance between the slits varies with time as d(t) = 2๐‘‘_๐‘œ + ๐‘‘_๐‘œsin๐œ”๐‘ก where ๐‘‘_๐‘œ and ๐œ” are positive constants . The difference between the largest and the smallest fringe width obtained over time is ( D = distance between slits and screen ≫d & ฮป=๐‘ค๐‘Ž๐‘ฃ๐‘’๐‘™๐‘’๐‘›๐‘กโ„Ž ๐‘œ๐‘“ ๐‘™๐‘–๐‘”โ„Ž๐‘ก ๐‘ข๐‘ ๐‘’๐‘‘ ) A ) ๐ทฮป/(2๐‘‘_๐‘œ ) B) ๐ทฮป/(3๐‘‘_๐‘œ ) c) 2๐ทฮป/(3๐‘‘_๐‘œ ) D) ๐ทฮป/(6๐‘‘_๐‘œ )

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