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Physics Ray Optics Level: High School

Light of wavelength 700.0 nm passes through a diffraction grating . The m = 0 and m = 1 bright spots are 6.0 cm apart on a screen positioned 2.0 cm from the grating . What is the spacing between the slits in the grating ? a. 233 nm b. 423 nm c. 467 nm d. 738 nm e. 1240 nm