A wedge is formed by placing a human hair of thickness 110 μm
between two glass plates (n = 1.55) on one end, and allowing them
to touch on the other end. The wedge is completely submerged
in ethanol (n = 1.361). This wedge is illuminated with yellow
light (λ = 580 nm in vacuum). How many dark fringes can be
observed as you look down on the wedge from above? Round to
the nearest whole number.
1 (52.43 KiB) Viewed 11 times
assume the glass platetouch here incident violet light upper glass plate ·lower glass plate drawing is not to scale cross section of hair
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