- If the magnitude of a quantity is always an integral multiple of a definite
unit, then that unit is called the quantum of the electromagnetic field and
the meson is considered to be the quantum of the nuclear field.
- Quantum Mechanics
- A system of mechanics based on quantum theory,
which arose out of the failure of classical mechanics and electromagnetic
theory to provide a consistent explanation of both electromagnetic wave and
- Quantum Theory
study of the jumps from one energy level to another as it relates to the structure
and behavior of atoms.
Fracture - A fracture mode that combines the characteristics of cleavage
fracture and dimpled rupture fracture. An intermediate type of fracture found
in certain high-strength metal.
- The rapid cooling of a metal by immersing it in
a bath of liquid in order to improve its properties.
- The loss of fluorescence by causes other than the removal of the exciting
radiation, for example, the action of heat, strong oxidizing agents, or strong
acids or alkalis.
- The sudden breaking of a direct current to be induced in the part by the
rapid collapse of the magnetic field. In magnetic particle testing, fast breaking
of the magnetizing current in a part which is favorable for finding transverse
defects at the ends of longitudinally magnetized bars. Such defects are often
concealed by the strong polarity at the bar ends. At such locations the lines
of force of the longitudinal field are leaving the bar in a direction normal
to the surface, which prevents them from intercepting transverse defects in
those areas. The field induced by the transient current does intercept such