In each question (a) through (d), write a question appropriate for this exam and then give an answer about 15-30 words long. Questions that can answered by looking up information simply from a book, website, or other source will not receive credit. You will be assessed both on the question's quality and the answer's correctness.

(a) A question about the electrical action potential of the human nervous system.

(b) A question about the use of electromagnetic waves in medicine.

(c) A question about the physics of your eyesight.

(d) A question about the use of quantum computers for security.