How is it possible for the ISS to stay in orbit? Learn more about the science behind orbiting Earth and more in this NASA ...

Abstract: In this letter, we propose using the conical conformal array antenna to launch the steering electromagnetic orbital angular momentum (OAM ... using conical array antenna is deduced and the ...

When we write the general equation of momentum (above), we use the equation for linear momentum. Angular momentum is the momentum of a body moving at an angle. In this case, the body’s mass is ...

Angular momentum is just the tendency for a rotating ... the quantum world of subatomic particles meets the most famous equation in the world: E = mc 2, which encapsulates Einstein's discovery ...

Even though the equations Einstein introduced in 1915 concern the curvature induced by massive objects, the theory does not offer a simple or standard way of determining what the mass of an object is.

First introduced nearly a century ago, the concept of spin angular momentum, or spin, is critically important ... spin density are derived in a very abstract way. It appears in some equations, but you ...