Light of wavelength A = 621.9 X 109m is incident on a metal plate that has two thin, parallel slits etched into it a distance of d = 5.68 X 106m apart. A distance of L = 0.79m away lies a viewing panel onto which the diffraction pattern can be displayed. How far from the central fringe is the first dark fringe (destructive interference)? 4.3248 x10'2m How far from the central fringe is the next bright fringe (constructive interference)? 8.649665 x10'2m What is the distance between the 4th and 8th bright fringes? 34.59866 X10'2m What is the brightness of the light a distance 0.43 X 102m from the central fringe, relative to the brightness of the central fringe? 98.05 >