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When one of the slits of Young’s experiment is covered with a transport sheet

When one of the slits of Young’s experiment is covered with a transport sheet of thickness 4.8 mm, the central fringe shifts to a position originally occupied by the 30th bright fringe. What should be the thickness of the sheet if the central fringe has to shift to the position occupied by 20th bright fringe?

Options

(a) 3.8 mm
(b) 1.6 mm
(c) 7.6 mm
(d) 3.2 mm

Correct Answer:

3.2 mm

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

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