Experiment 3 - The RLC Tuned Circuit. This experiment shows you some of the properties of circuits which contain resistors, capacitors, and inductors.
Resonance is an important physical phenomenon.
It can occur in all sorts of systems, from a swinging mechanical pendulum to an optical cavity. In each case it requires a situation where energy is periodically transferred back and forth between two possible 'reservoirs'. In an optical cavity the transfer is between the electric and magnetic fields inside the cavity. One of the easiest ways of making a filter for this sort of task is to combine a resistance, capacitance, and inductance. Diagram 4 shows a typical arrangement.