From the relation between polarization charge and electric field;
for free space, ε0 = 8.85 × 10-12 F/m.
Phase shift
A time difference between the input and output signals.
Phase transformation
A change in the number and/or character of the phases that make up
the microstructure of an alloy.
Phonon
A single quantum of vibrational or elastic energy.
Phosphorescence
Luminescence that occurs at times greater than on the order of a
second after an electron excitation event (see
also"luminescence").
Photodiode
Semiconductor diode that produces voltage (current) in response to
illumination (see also"phototransitor").
Photomicrograph
The picture made with a microscope.
Phototransistor
Transistor that, when powered, produces amplified voltage
(current) in response to illumination.
Piezoelectric material
A ferroelectric material in which an electrical potential
difference is created due to mechanical deformation, or
conversely, in which the application of a voltage causes
dimensional changes in the material.
Pin-out
Diagram showing for electronic components the relations between
connecting pins and internal components.
