Questions #28 - 32: Green light of wavelength A = 532 nm is incident on a thin film of acetone (n = 1.359) on a surface of quartz glass (n = 1.46). 28. What type(s) of boundaries are present? A. 1 hard boundary, 1 soft boundary C. 2 hard boundaries B. 2 soft boundaries D. impossible to determine 29. At what thickness of the film does the first strong reflection occur? A. 195.7 nm C. 293.7 nm B. 97.9 nm D. 587.1 nm 30. At what thickness of the film does the first weak reflection occur? A. 195.7 nm C. 97.9 nm B. 293.7 nm D. 587.1 nm 31. If the surface were changed to water (n = 1.33) instead of quartz glass, how would your answer for Question #29 change? Calculate the thickness of the film producing the first strong reflection in this case. A. 195.7 nm C. 587.1 nm B. 97.9 nm D. 293.7 nm Phys 251 Midterm Exam #3 - Page 9 of 12 April 4 - 9, 2024 32. If the surface were changed to water (n = 1.33) instead of quartz glass, how would your answer for Question #30 change? Calculate the thickness of the film producing the first weak reflection in this case. A. 587.1 nm C. 97.9 nm B. 293.7 nm D. 195.7 nm