A thin flake of mica ( n = 1.58 ) is used to cover one slit ofa double slit interference arrangement. The central point on theviewing screen is now occupied by what had been the seventh brightside fringe ( m = 7 ). If λ = 550 nm, what is thethickness of the mica?

the thickness of the mica is 6.64μm

Explanation:

By definition we know that the phase between two light waves that are traveling on different materials (in this case also two) is given by the equation

Where

L = Thickness

n = Index of refraction of each material

Our values are given as

Replacing our values at the previous equation we have

the thickness of the mica is 6.64μm

wavelength divides in half and speed stays the same.

answer; how far out of place which the object finished relative to the starting location;