142 Light from a sodium lamp, lambda = 600 nm, is diffracted by a slit of width d = 0.60 mm. The distance from the slit to the screen is D = 0.6. m. Then, the width of the central maximum is a. 2.4mm b. 1.2mm c. 0.6mm d. 4.8 mm

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[AMU (Med.) 2002]

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