PHYS 202 Midterm: PHYS 202 TAMU 202s10 Exam 3
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Write your answers in the blanks provided. (16 pts) 1. A thin horizontal film of water with thickness 7. 00 x 10 m and refractive. The film is illuminated by a beam of white light index n that is normal to the film. Coherent laser light passes through a narrow slit that has width 1. 50 x i0 m and falls on a screen that is 4. 00 m from the slit. A ray of light traveling in glass is incident on the interface between the flat surface of the glass and a liquid. The refractive index of the glass is 1. 70. If the incident ray makes an angle smaller that 38. 0 with the surface of the glass, no light refracts into the liquid. An upright object that is 2. 0 mm tall is placed to the left of a concave spherical mirror that has focal length f = +20. 0 cm.
