1. A superconducting film can be used as a high sensitivity bolometer (an instrument for measurement of heat radiation). Explain.
2. To what extent can the two electrons in a Cooper pair be thought of as moving as if they were bound to opposite ends of a spring? What property of the system constitutes the spring?
3. Exactly what is the distinction between the energy states of an electron in a superconductor and the energy states of the superconductor itself?