期刊： AMERICAN JOURNAL OF PHYSICS, 2021; 89 (6)
The naive Bohr quantization condition mvr = nh is applied to arbitrary spherically symmetric power-law potentials. The dependence of the energy eigenv......
期刊： AMERICAN JOURNAL OF PHYSICS, 2021; 89 (5)
By finding that the projection operators of the basic quantum mechanical representations can be written as operator delta functions, we derive the exp......
期刊： AMERICAN JOURNAL OF PHYSICS, 2021; 89 (4)
We devise an undergraduate experiment to evaluate the wind turbine power coefficient. The apparatus features a commercial miniature rotor hub that all......
期刊： AMERICAN JOURNAL OF PHYSICS, 2020; 88 (1)
Deriving the same result with different approaches is not only an interesting experience but is also useful in teaching. Several connected derivations......
期刊： AMERICAN JOURNAL OF PHYSICS, 2020; 88 (2)
We study the subharmonic frequency response of a generalized driven oscillator excited by a nonlinear periodic force. We take a magnetic pendulum call......
期刊： AMERICAN JOURNAL OF PHYSICS, 2020; 88 (12)
An elementary, analytically soluble example of a pair of isospectral potentials is discussed. This example was developed in response to an inquiry by ......
期刊： AMERICAN JOURNAL OF PHYSICS, 2020; 88 (5)
The starburst effect generally refers to the phenomenon where radial bright lines emerge from a light source in photographs. In this work, the light i......
期刊： AMERICAN JOURNAL OF PHYSICS, 2020; 88 (9)
In this study, a simple asymmetrical double torsion pendulum is built and operated to study coupled harmonic motion. The setup, which consists of two ......
期刊： AMERICAN JOURNAL OF PHYSICS, 2019; 87 (2)
We study the nonlinear behaviors of mass-spring systems damped by dry friction using simulation by a nonlinear LC circuit damped by anti-parallel diod......
期刊： AMERICAN JOURNAL OF PHYSICS, 2018; 86 (4)
Relativity requires that a particle's momentum and energy are the same functions of the particle's velocity in all inertial frames. Using the fact tha......
期刊： AMERICAN JOURNAL OF PHYSICS, 2018; 86 (12)
If a highly elastic ball is thrown into the space between two parallel matte plates, under some circumstances, the ball might be projected back in the......
期刊： AMERICAN JOURNAL OF PHYSICS, 2018; 86 (9)
We discuss the optical analogy of reflected electron diffraction from a grating with non-uniform spacing at the nanoscale, and its relationship to ano......
期刊： AMERICAN JOURNAL OF PHYSICS, 2017; 85 (2)
The generalized scattering coefficient (GSC) method is pedagogically derived and employed to study the scattering of plane waves in homogeneous and in......
期刊： AMERICAN JOURNAL OF PHYSICS, 2017; 85 (4)
The dynamics of a two-layered rotating liquid at low angular velocity in a cylindrical container is explored, both experimentally and theoretically, u......
期刊： AMERICAN JOURNAL OF PHYSICS, 2017; 85 (11)
The rotating saddle not only is an interesting system that is able to trap a ball near its saddle point, but can also intuitively illustrate the opera......
