quantum stuff

what is wavelength

a consecutive trough and crest

what is frequency

the number of full wavelengths that pass a given point every second

equation for relationship between wavelength and frequency

c = lamda(f)

what is a blackbody

a perfect absorber and emitter of energy

what did planck discover about light from blackbodies

that energy is not continuously absorbed, it is transfered in packets or quanta

equation for energy of a photon

E = hf

what did scientists think increasing amplitude would do?(photoelectric effect)

increase kinetic energy of emitted electrons

what did scientists think increasing frequency would do to electrons?

increase current/ rate of electron emission

what ACTUALLY happened to electrons when increasing the frequency of light

the kinetic energy of electrons increased and current/rate of electron emission stayed the same

what ACTUALLY happened to electrons when increasing the light amplitude?

increased current and constant kinetic energy

what is the work function

the minimum amount of energy required to induce emission of electrons from a metal surface(depends on the metal)

main photoelectric effect equation

E(photon) = KE(electron) + work function

what is threshold frequency

the minimum frequency for electrons to be emitted regardless of light’s amplitude