Light from a 600 nm laser is shown through a single slit of unknown width. If a screen is placed 4.5 m behind the slit captures a diffraction patter with a central bright fringe of width 20 mm, what is the width of the single slit?

• A. 0.13 mm
• B. 0.11 mm
• C. 0.44 mm
• D. 0.26 mm