Figure 40-8 depicts a laboratory setup for grating experiments. The diffraction grating has 5000 lines/cm and is

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Figure 40-8 depicts a laboratory setup for grating experiments. The diffraction grating has 5000 lines/cm and is 1.00 m from the slit, which is illuminated with sodium light. On either side of the slit, and parallel to the grating, is a meterstick. The eye, placed close to the grating, sees virtual images of the slit along the metersticks. Determine the wavelength of the light if each firstorder image is 31.0 cm from the slit.Grating 0 0 100 cm Fig. 40-8 31 cm 0 31 cm first-order Slit first-order Source:

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