The discovery of photoelectricity (AQA A-Level Physics): Flashcards

Absorbs & emits radiation across all wavelengths

Classical theory predicted infinite UV; not observed

$E = hf$

Light on metal surface causes electron emission

Min. frequency needed for electron emission

Light particle carrying energy $E = hf$

Min. energy to release electron from metal

More electrons emitted/sec, not higher kinetic energy

$E_k = eV_s$

$E_k = hf - Phi$