School MasterS

For a single slit Diffraction pattern,
the width of the pattern is inversely proportional to the slit width.
http://hyperphysics.phy-astr.gsu.edu/HBASE/phyopt/fraungeo.html

-Sree

d (Slit width) sin (Diffraction Angle)= Wavelength
Angle decreases as d increases diffraction decreases derfore diffraction pattern wl slowly disappear if u go on increasing d slit width

for visualizing these things

http://wyant.optics.arizona.edu/multipleSlits/multipleSlits.htm