Question: A helium-neon laser ( = 633 nm) illuminates a diffraction grating. The distance between the two m = 1 bright fringes is 32 cm on

A helium-neon laser (λ = 633 nm) illuminates a diffraction grating. The distance between the two m = 1 bright fringes is 32 cm on a screen 2.0 m behind the grating. What is the spacing between slits of the grating?

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