This Resource Letter provides a guide to a selection of the literature on gravitational lensing and its applications. Journal articles, books, popular articles, and websites are cited for the following topics: foundations of gravitational lensing, foundations of cosmology, history of gravitational lensing, strong lensing, weak lensing, and microlensing.

A general relativistic description of a disk rotating at constant angular velocity is given. It is argued that describing this situation using general relativity poses fewer conceptual problems than using special relativity. For observers on the disk, the geometry of their proper space is hyperbolic. This has interesting consequences concerning their interpretation of the geometry of a non-rotating disk with the same radius. The influence of clock synchronization on spatial measurements is discussed.

Future scientists and engineers must master fundamental notions of instrumentation. A lab session milestone based on the classical RLC circuit is proposed to check students’ theoretical and practical knowledge. Topics include impedance, signal and linear system analysis in the time and frequency domains, as well as the fundamental relations connecting them. The numerical implementation of the Fourier transform and its related pathologies (aliasing and leakage) are also discussed. Practical skills are evaluated through the intensive use of instruments and by presenting and solving potential problems that could alter the accuracy of measurement.