1, The focus of the lecture is simple harmonic motion.

2, The system executes simple harmonic motion.

3, The lecture ends with a discussion of simple harmonic motion.

4, Amplitude, frequency and period of simple harmonic motion are also defined in of the lecture.

5, Hooke's Law - Springs - Simple Harmonic Motion - Pendulum - Small Angle Approximation.

6, Their appearance is connected with anharmonicity, which leads to a breakdown of the selection rules derived assuming simple harmonic motion.