Astronomers measure a black hole's spin by determining its angular momentum, representing the total angular momentum of all matter absorbed beyond the event horizon. A black hole's spin causes the ...

When an electron orbits around the nucleus in an atom, simple models describe its motion with spin and angular momentum. Spin means, in a classical picture, that the electron spins around much like a ...

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 ...

It's almost always the last topic in the first semester of introductory physics—angular momentum. Best for last, or something? I've used this concept to describe everything from fidget spinners to ...