a. On the right wall, an interference pattern emerges. What is the distance y between the bottom corner and the closest bright fringe above it? Hint: you may assume λ≪y≪L as well.
Given constants:
## Mirror Mirror on the Wall
Consider a square room with side length L. The bottom wall of the room is a perfect mirror.* A perfect monochromatic point source with wavelength λ is placed a distance d above the center of the mirror, where λ≪d≪L.
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*Remember that the phase of light reflected by a mirror changes by 180∘.