General PE Effect
Definition of the photoelectric effect.
What is the emission of electrons from a material when it absorbs electromagnetic radiation?
Light particle.
What is a photon?
In classical wave theory, the property of light that determines how much energy it carries.
What is intensity?
The minimum frequency of light required to eject electrons from a metal surface.
What is threshold frequency?
The particles that are ejected from a metal during the photoelectric effect.
What are electrons?
Principle that suggests that although light can have wave-like properties, it can also behave as a particle.
What is the duality principle?
Two main expirimental observations that condradicted classical wave theory.
What is instantaneous ejection and threshold frequency?
What occurs when light with frequency below the threshold frequency shines on a metal, regardless of intensity.
What is no electrons are emitted?
The physicist responsible for explaining the photoelectric effect.
Who is Albert Einstein?
The main expirimental result explained by Einstein's photon theory.
What is instaneous ejection?
In classical EM theory, the only thing frequency of light was known to affect.
What is color?
The reason different metals have different threshold frequencies.
What is different work functions?
The physicist famous for discovering the photoelectric effect.
Who is Heinrich Hertz?
The form taken by energy in excess of the metal’s work function after an electron is emitted.
What is kinetic energy?
The incorrect classical assumption that electrons can absorb energy continuously over time.
What is that energy transfer is continuous?
What the work function of a metal means in terms of energy.
What is the energy required to free electrons from a material? (overcome the binding energy of the elctrons)
Two expirimental observations of the photoelectric effect.
What is threshold frequency and instantaneous ejection?
The key reason Einstein’s photon theory succeeded where classical wave theory failed.
What is that light energy is quantized rather than continuous?
The claassical reasoning supporting the idea any frequency should eject electrons if intensity is high enough.
What is that energy is continuous and obsorbed over time?
The reason threshold frequency cannot be explained using classical wave theory.
What is that classical physics does not include quantized energy?