Portion of impedance that characterizes non-dissipative, energy
storage effects (also see"impedance").
Reactant
A starting substance in a chemical reaction. It appears to the left of
the arrow in a chemical reaction.
Recrystallization
The formation of a new set of strain-free grains within a previously
cold-worked material due to an annealing heat treatment.
Rectifier
Device that converts bi-directional to one-way current flow.
Reduction
The addition of one or more electrons to an atom, ion, or molecule.
Reflection
Deflection of a light beam at the interface between 2 media.
Refraction
Bending of a light beam when passing from one medium to another, at
different velocities of light.
Refractory
A metal or ceramic that does not deteriorate rapidly or does not melt
when exposed to extremely high temperatures.
Relative magnetic permeability (µr)
The ratio of the magnetic permeability of some medium to that of a
vacuum (unitless), or: µr = µ/µ0,
where µ0 is the permeability of
vacuum, a universal constant, which has a value of
1.257x10-6 H/m.
Reliability (life, multi-use vs. single, calibration vs. accuracy drift)
How well a sensor maintains both precision and accuracy over its
expected lifetime. Also includes the robustness of the sensor.
