phs 112 vocab final maybe

coulomb

unit of electric charge — named after charles coulomb

friction

transfer of charge by rubbing

ampere

flow of 1 coulomb per second

ohm

volt/ampere

series circuit

the same current passes through all the resistances

electric motor

a device that converts electrical energy into mechanical work

generator

a device that converts mechanical energy into electrical energy

macrocosm

the description and explanation of large scale phenomena — classical physics

microcosm

modern physics — the subatomic world

daltons billiard ball model

matter is discrete and must exist as particles

thomson plum pudding model

discovered the electron by producing rays using several gas types in cathode ray tubes

rutherfords model

envisioned the atom as having a dense center of positive charge (nucleus) around which electrons orbited

ultraviolet catastrophe

classical wave theory could not explain why i is not exponential to f

planck

introduced the idea of a quantum — an oscillating electron can only have discrete amounts of energy

laser

light amplification by stimulated emission of radiation

heisenbergs uncertainty principle

it is impossible to know a particles exact position and velocity simultaneously

de broglie

matter has properties of both waves and particles

wavelength of visible light

400-700nm

alpha decay

disintegration of a nucleus into nucleus of another element with the emission of an alpha particle

beta decay

a neutron is transformed into a proton

gamma decay

occurs when a nucleus emits a gamma ray and becomes a less energetic form