E,W&P 3 Flashcards
PHOTOELECTRIC EFFECT
the emission of electrons from the surface of material when electromagnetic radiation is incident on the surface
PHOTON
a quantum/particle of light
PLANCK CONSTANT (h)
6.63 x 10-34
PLANE POLARISED WAVE
a transverse wave oscillating in only one plane
POLARISATION
the process of turning an unpolarised wave into a plane polarised wave
POTENTIAL DIFFERENCE
the electrical energy transferred per unit chage when electrical energy is converted into some other form of energy
POTENTIAL DIVIDER
a type of circuit containing two components designed to divide up the p.d in proportion to the resistances of the components
POTENTIAL ENERGY
a form of stored energy
PROGRESSIVE WAVE
a wave that travels from one place to another
QUANTUM
a discrete, indivisible quantity
RADIAN
unit of angle or phase difference
REFLECTION
when waves rebound from a barrier changing direction but remaining in the same medium
REFRACTION
when waves change direction when they travel from one medium to another due to a difference in the wave speed in each medium
RESISTANCE (R)
a property of a component that regulates the electric current through it (ohms)
SEMICONDUCTOR
material with lower number density of conduction electrons and higher resistance than a conductor