Questions #21 - 27: A diffraction grating has 5000 rulings over a distance of 1.00 cm, where each ruling acts as an effective slit for multiple slit diffraction. Using the diffraction grating to separate the colors, bright lines (i.e. diffraction maxima) are observed and three of the lines are measured at the angles 30.1, 36.0 and 41.9 in second order diffraction. 21. What is the effective slit separation in nm? A. 5000 nm C. 200 nm B. 2000 nm D. 50 nm 22. What wavelength is observed at 30.10? A. 438.7 nm C. 632.8 nm B. 702.9 nm D. 501.5 nm It Phys 251 Midterm Exam #3 - Page 7 of 12 April 4 - 9, 2024 23. What wavelength is observed at 36.0? A. 394.7 nm C. 587.8 B. 612.7 nm D. 544.6 nm 24. What wavelength is observed at 41.90? A. 412.9 nm C. 698.3 nm B. 667.8 nm D. 501.2 nm 25. What is the corresponding wavelength in second-order diffraction for the wavelength in Question #22 if the entire apparatus is submerged in glycerin (n = 1.473)? NO > A. 340.5 nm C. 444.8 nm V B. 567.3 nm D. 392.8 nm