Neon sign through a diffraction grating
If you looked at an incandescent light bulb and a neon sign through a diffraction grating, describe the differences you would observe in the spectra. Explain your reasoning.
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A parallel beam of light from a He-Ne laser, with a wavelength of 652 nm, falls on two very narrow slits 0.050 mm apart. How far apart are the fringes in the center of the pattern on a screen 2.7 m away?
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