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A beam of light of wavelength 600nm from...

A beam of light of wavelength 600nm from a distance source falls on a single slit 1mm wide and a resulting diffraction pattern is observed on a screen 2m away. The distance between the first dark frings on either side of central bright fringe is

A

1.2mm

B

1.2cm

C

2.4cm

D

2.4mm

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