A person at rest is standing on a low-friction platform or chair and holding a spinning wheel. If the person tilts the wheel, she or he will start rotating according to the law of conservation of ...

Surprising as it may sound, 107 years after the introduction of general relativity, the meanings of basic concepts are still being worked out. More than a century after Albert Einstein unveiled ...

This course introduces the quantum mechanical concept of angular momentum operator and its relationship with rotation operator. It then presents the angular momentum operators, their eigenvalues and ...