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				| 1. | A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of the central bright fringe is [IIT-JEE 1994; KCET 2004] | 
| A. | 1.2 mm | 
| B. | 1.2 cm | 
| C. | \[0.2\,\,{AA}\] | 
| D. | 2.4 mm | 
| Answer» E. | |