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Question
Choose the correct option:
In Young's double-slit experiment, a thin uniform sheet of glass is kept in front of the two slits, parallel to the screen having the slits. The resulting interference pattern will satisfy:
Options
The interference pattern will remain unchanged
The fringe width will decrease
The fringe width will increase
The fringes will shift
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Solution
The interference pattern will remain unchanged
Explanation:
When a barrier is placed before the slits, the only effect that comes is the slowing down of the particle in the sheet of material due to its refractive index. As the glass sheet is placed before both the slits, this change will be even. And hence there is no change in the resultant interference pattern.
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