Lab 11-Reflection and Refraction

Lab 11: Reflection and Refraction Name _____ Date___________ Lab Partner(s) _____________________________________ Laboratory Report NOTE : Use Excel to plot the graphs and insert or attach all graphs , plots, and tables to this lab assignment. Show all your calculations and graphs . If needed, include additional pages or do your work on a separate sheet and insert a scanned copy or picture to your lab report. Your grade will drastically be reduced if no work is shown. A. Reflection ANGLE OF INCIDENCE ANGLE OF REFLECTION Plane mirror Convex mirror Concave mirror  i  r % error  r % error  r % error 0 o 0 0 5 0 1 10 10 o 5 -5 13 -3 11 1 20 o 10 -5 18 -1 20 0 30 o 20 -3.3 28 -0.66 31 0.33 40 o 28 -3 38 -0.5 43 0.75 50 o 39 -2.2 48 0.4 52 0.4 60 o 48 -2 56 -0.66 61 0.16 70 o 56 -2 65 -0.714 69 -0.14 80 o 69 -1.375 70 -1.25 81 0.125 B. Refraction ANGLE OF INCIDENCE  1 ANGLE OF REFRACTION  2 SI N  1 SIN  2 10 o 7 0.17 0.12 20 o 14 0.34 0.24 30 o 19 0.5 0.32 40 o 25 0.64 0.64 50 o 30 0.77 0.77 60 o 34 0.87 0.87 70 o 38 0.94 0.94 Plot sin  1 (Y-axis) vs. sin  2 (X-axis) and find the slope which is the measured refraction index ( n ) of the glass. (slope) n = ___ 1.139x-0.1311_

Lab 11: Reflection and Refraction Insert here a screenshot of your Excel graph , showing title, data points, axis labels and units, and equation of trendline. C. Critical Angle Measured critical angle  c = 41 Refractive index of the glass n  1 = sin  c Questions 1. When you look at reflections in a sheet of glass, you can often see a double image. Why? the double image seen in a sheet of glass is due to light both reflecting off the surface of the glass and refracting.

Lab 11: Reflection and Refraction the angle of refraction clockwise and counterclockwise using the angle of incidence given. We created a scatter graph for each data table to see if the results we got matched with the laws of angle of reflection In conclusion, we learned to measure the angle of refraction clockwise and counter-clockwise using the angle of incidence given. We created a scatter graph for each data table to see if the results we got matched with the laws of angle of reflection.