This drill involves electromagnetic radiation. When you press "New Problem", one of the cells in the first table will be
filled.
Enter the two missing values and press "Check Answer". Results appear in the
second table. Pay close attention to the dimensions. Use "e"
notation for sci notation; thus, 2.3e-4 equals 2.3*10-4. Pressing "Show Answer" will cause the correct answer to appear and you will no longer be able submit an answer for that problem.