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Online Physics Glossary
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Word Meaning Remarks
P-type semiconductor Semiconductor in which conduction is the result of motion of holes.
Pair production Formation of particle and antiparticle from gamma rays.
Parabolic mirror Mirror the shape of a paraboloid of revolution that has no spherical aberration.
Parallel circuit Circuit in which there are two or more paths for current flow.
Parallel connection Connection of two or more electrical devices between two points to provide more than one current path.
Pascal SI unit of pressure; one neutron per square meter.
Pascalís principle Pressure applied to a fluid is transmitted undiminished throughout it.
Period Time needed to repeat one complete cycle of motion.
Periodic motion Motion that repeats itself at regular intervals of time.
Photoelectric effect Election of electrons from surface of metal exposed to electromagnetic radiation.
Photon Quantum of electromagnetic waves; particle aspect of these waves.
Photovoltaic cell Device that converts electromagnetic radiation into electrical energy.
Physics Study of matter and energy and their relationship.
Piezoelectricity Electric potential produced by deforming material.
Pigment Colored material that absorbs certain colors and transmits or reflects others.
 
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