Problem M. 273. (November 2006)
M. 273. The display of a solar cell powered calculator turns off if some part of the solar cell is covered. (Use a calculator which does not have a back-up battery.) Find the limit case, and examine the relationship between the area of the uncovered surface and the intensity of light. Shading the uncovered part of the solar cell with semi-permeable foils investigate how the absorption of light depends on the number of layers.
Deadline expired on 11 December 2006.