MP10-2: Induced EMF and Current in a shrinking loop (practice, spoiler)

MP11-2: Ray tracing and image formation with a concave lens (practice, spoiler)

MP11-2: Total Internal Reflection Conceptual Question (practice, spoiler)

Total Internal Reflection can happen only going from high n to a lower n. The more extreme the difference (as a ratio) the smaller the angle at which total internal reflection can happen, as measured in the medium the light is departing.

MP11-2: An antique telescope (practice, spoiler)

MP10-2: Locate the object (practice, spoiler)

MP10-2: A Sparkling Diamond II (practice / spoiler)

The key to Part B is drawing a good diagram and realizing that (theta b) = (alpha) - (theta c).

MP7-2: FM radio interference (practice, spoiler)

MP7-2: constructive interference (practice, spoiler/hints)

MP7-1 LRC-AC (practice problem)

MP7-1: Constructing a low pass filter (practice problem)