When the 600 nm wavelength light. Fall impact single slit It found that the dark bar with sequence 2. 37° angle with the horizontal Ben Middle slit width in units find NM.
When the light wavelength of 600 nm single incident slit. Found that the darker sequences for two Ben 37 degrees angle with the horizontal slit in the middle of finding a nanometer.
When the light wavelength 600 nm. Hits a single slit, it was found that the company 2 Ben dark bar angle 37 degrees with the center for wide slit in the nm.