Moiré Pattern of Two Straight Line Patterns

angle 1

3.1

angle 2

8.2

lines

70

The Moiré pattern formed using two sets of straight line patterns illustrates the interference fringes produced by interfering two plane waves. The spacing of the Moiré pattern depends on the angle between the two straight line patterns, just like the spacing of interference fringes depends upon the angle between two plane waves. The spacing of the lines can be thought of as the wavelength of the two plane waves. For a given angle between the two plane waves the smaller the wavelength, the smaller the spacing of the interference fringes.