The following concepts and activities recorded improved level of candidates understanding:
recording data in composite table;
correctly indicated the units of measured and calculated values;
correctly determined of slope of graphs;
slect5ing good and reasonable scales for graphs;
correctly distinguished between the axes;
stating precautions in acceptable language;
distinguishing between period and frequency of oscillation;
evaluation of! = y/d, k = l/s and q = 2ws;
stating correctly the conditions for total internal reflection.