Marking these points on the paper, the gelatin shape can then be removed. Connect the entry point with the exit point and measure the angle of incidence and the angle of refraction. From this the index of refraction can be calculated. Let students choose an appropriate style of graph for illustrating the data. Compare the index of refraction of the gelatin with that of other materials.
Students can present their work in written form or as a poster project.
Evaluate the data table, graphs and charts to indicate the correlation students found between the various variables. Evaluate the quality and the depth of research that was done.