Методичне забезпечення

Pair annihilation - the disappearance of a particle and its anti-particle when they collide

Pair creation - the production of a particle and its anti-particle from a vacuum

Parallel connection - resistors connected so that they have the same potential difference across them

Parallel plates - two parallel and equally but oppositely charged plates

Penetrating - the ability to move deep into a material

Period - the time needed to produce one full oscillation or wave

Periodic - motion that repeats

Permittivity of vacuum - the constant s appearing in Coulomb's law when the charges are situated in a vacuum

Phase - the state of a substance depending on the separation of its molecules; we consider the solid, liquid and vapour phase in this course

Phase change - the phase of a wave increases by π (radians) upon reflection from a medium of higher refractive index