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Homework Statement
Consider the double-slit arrangement shown in the figure below, where the separation d is 0.280mm and the distance L is 1.16m. A sheet of transparent plastic (n = 1.50) 0.0513mm thick (about the thickness of a piece of paper) is placed over the upper slit. As a result, the central maximum of the interference pattern moves upward a distance y'. What is y'?
Homework Equations
PD / d = xL
n = c/v
The Attempt at a Solution
I'm sorry. but I have absolutely no idea how to approach this. I've just been looking through my books and trying to find equations to plug the given information into, but no dice. Any help would be greatly, greatly appreciated. Thank you so much!