What is Microgravity and what you need to know about it

Microgravity is the condition in which people or objects appear to be weightless. The effects of microgravity can be seen when astronauts and objects float in space. Microgravity can be experienced in other ways, as well. “Micro-” means “very small,” so microgravity refers to the condition where gravity seems to be very small. In microgravity, astronauts can float in their spacecraft – or outside, on … Continue reading What is Microgravity and what you need to know about it

What you need to know about antimatter

Antimatter refers to sub-atomic particles that have properties opposite normal sub-atomic particles. Antimatter is the opposite of normal matter. More specifically, the sub-atomic particles of antimatter have properties opposite those of normal matter. What is antimatter used for? PET (positron emission tomography) uses positrons to produce high-resolution images of the body. Positron-emitting radioactive isotopes (like the ones found in bananas) are attached to chemical substances … Continue reading What you need to know about antimatter

Understanding what SuperGravity is

In theoretical physics, supergravity is a modern field theory that combines the principles of supersymmetry and general relativity, in contrast to non-gravitational supersymmetric theories such as the Minimal Supersymmetric Standard Model. Supergravity is the gauge theory of local supersymmetry. Since the supersymmetry (SUSY) generators form together with the Poincare Algebra a Superalgebra, called the super-Poincare algebra, supersymmetry a gauge theory makes gravity arise in a … Continue reading Understanding what SuperGravity is

Scientists prove the existence of the Rashba effect

The Rashba effect, also called Bychkov-Rashba effect, is a momentum-dependent splitting of spin bands in bulk crystals and low-dimensional condensed matter systems ( such as heterostructures and surface states) similar to the splitting of particles and anti-particles in the Dirac Hamilttonian. The splitting is a combined effect of spin-orbit interaction and asummetry of the crystal potential, in particular in the direction perpendicular to the two-dimensional … Continue reading Scientists prove the existence of the Rashba effect