A helium-neon laser lambda6328 nm illuminates a diffraction
A helium-neon laser (λ=632.8 nm) illuminates a diffraction grating. The distance between the two m=1 bright fringes is 32 cm on a screen 2 m behind the grating. Find the spacing between slits of the grating?
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a helium-neon laser lambda6328 nm illuminates a diffraction grating the distance between the two m1 bright fringes is
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