Quantum physics Flashcards
Quantum
A small discrete unit of energy
Photon
quantum associated with electromagnetic radiation
Energy of a photon
Plancks constant x frequency
(Plancks constant x speed)/wavelength
Electronvolt
The kinetic energy gained by by an electron when it is accelerated through a p.d of 1 volt.
The photoelectric effect
When UV light shines onto a negatively charged metal surface, the gold leaf falls, as the negative charge is lost through the emission of electrons
Threshold frequency
The lowest frequency of radiation that will result in the emission of electrons from a metal surface.
Work function
The minimum energy required to release an electron from the metal surface.
Increasing the intensity will result in…
more number of electrons being released
wave-particle duality
the theory that all particles exhibit wave and particle properties
Wavelength=
h/p
