A spacer is cut from a playing card of thickness 2.88 × 10−4 m and used to separate one end of two rectangular, optically flat, 3.30 cm longglass plates with n = 1.60, as in the figure below. Laser light at 543 nm shines straight down on the top plate.HINTAdjacent dark bands occur when the air gap thickness changes by half a wavelength.Click the hint button again to remove this hint.(a) Count the number of phase reversals for the interfering waves.1061XNeed Help?Ⓡ(b) Calculate the separation (in m) between dark interference bands observed on the top plate.3.11XmRead It

Given that, Thickness is given by, t = 2.88 × 10^(–4) mLength of the glass plate is given by, l =…

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