1. The problem statement, all variables and given/known data 33. This experiment projects a red laser light beam of wavelength λ through a diffraction grating labeled 750 lines/mm onto a screen that is positioned a distance l from the diffraction grating. The diffraction grating has a distance d between adjacent lines. The distance between the central maximum and first order bright line is x. In order for the bright lines produced on the screen to appear closer together, what change could be made in the above experiment? a. Replace the red laser with a green laser. b. Move the laser farther from the diffraction grating c. Move the diffraction grating farther from the screen. d. Replace the diffraction grating with one that is labeled 800 lines/mm. e. Rotate the diffraction grating by a small angle within the same place 34. Which of the following could produce the largest real image of an object? a. Convex mirror, f=-5 cm, with object 3 cm from center of mirror. b. Concave lens, f=-5 cm, with object 3 cm from center of lens c. Convex lens, f=5 cm, with object 3 cm from center of lens d. Convex lens, f=10 cm, with object 12 cm from center of lens. e. Concave mirror, f=15 cm, with object 10 cm from center of lens. 35. A thin film of oil on water causes us to seen a green reflection of light. Which of the following must be true? i. The light source must be only green light. ii. The oil must be of lower index of refraction than the water. iii. Other colors present in the incident beam underwent destructive interference a. i only b. ii only c. iii only d. i and ii only e. ii and iii only 2. Relevant equations 3. The attempt at a solution 33 is E? - all the others do not seem right 34 - i have no idea 35 - b or e - destructive interference?