The setup for CRDS consists of an analyte in one of these systems where intensity exponentially decays over the ringdown time. 2012 Nobel Prize in Physics winner Serge Haroche recreated Schrödinger’s cat by firing Rydberg atoms into one of these systems. RF signals are input and output into a pair of these systems called the catcher and buncher of a klystron tube. A high-finesse one of these systems that selectively transmits light composes a Fabry–Pérot interferometer. A prototypical model of a blackbody is as one of these systems with a small hole cut into it. A laser contains a resonant one of these systems formed out of two mirrors that surrounds its gain medium. For 10 points, name these physical systems consisting of a hollow space in which confined photons can bounce back and forth. ■END■
ANSWER: optical cavities [or optical cavity; or cavity resonators; or resonant cavities; or optical resonators; prompt on waveguides; prompt on resonators by asking “what specific type of resonator?”; prompt on interferometers; prompt on Fabry–Pérot interferometers until read by asking “what sort of physical system is a Fabry–Pérot interferometer made of?”]
<GC, Physics>
= Average correct buzz position