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13. 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 m from the grating. What is the spacing between the slits in the grating? A. 23.3 pum B. 42.0 um C. 46.7 Hum. D. 73.8 Hm E. 124 um 14. Monochromatic light shines on a metal surface of work function 1.80 eV. If the maximum KE of the ejected photoelectrons is 0.620 eV, what is the of monochromatic light? A. 200nm B. 290nm C. 689nm D. 602nm. E. 512nm

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