<p align="right">Last Update: <font color="#4f81bd">November 29, 2024</font></p> ## BIG IDEAS - A photon is a bundle of [[energy]]; that is, a quantized packet of [[electromagnetic radiation]]. - Photons are discrete bundles of light energy that obey Planck's hypothesis of energy quantization. - Einstein's photon model describes a beam of light as a beam of particles, each carrying energy $hf$ - The term photon was not used until 1926; the term was introduced by G. N. Lewis. - The energy of a photon is determined solely by its [[Frequency|frequency]]. ### Related Topics --- [[Home|Home]] | [[Quantum mechanics]] | [[Notes Vault/Physics Notes Vault/Quantity of Motion/Quantum Mechanics/Blackbody Radiation|Blackbody Radiation]] | [[Photoelectric Effect]] | [[Atomic Theory]]