Question: 3 . When passed through a diffraction grating with a slit spacing of . 0 0 0 4 mm , the first order fringe for

3. When passed through a diffraction grating with a slit spacing of .0004 mm, the first order
fringe for light of a single wavelength lies a distance of 27 cm from the center of a screen
located 1.9 m from the grating.
a. What is the wavelength of the light?
b. What is the color of the light?

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