In a Young's double-slit experiment, a monochromatic light source of wavelength 600 nm is used. When a thin glass plate of refractive index 1.5 is placed in the path of one of the interfering beams, the central bright fringe is observed to shift to the position previously occupied by the 5th bright fringe. What is the thickness of the glass plate?
Text Solution
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We also know that the position of the 
-th bright fringe is given by:
Given that the central bright fringe shifts to the position previously occupied by the 5 th bright fringe, we have 
.
Therefore, 
.
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