What you’ll learn5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.22.1.1Electromagnetic radiation has a particulate nature• understand that electromagnetic radiation has a particulate natureSyllabus objective22.1.2A photon is a quantum of electromagnetic energy• understand that a photon is a quantum of electromagnetic energySyllabus objective22.1.3E = hf• recall and use E = hfSyllabus objective22.1.4The electronvolt (eV) as a unit of energy• use the electronvolt (eV) as a unit of energySyllabus objective22.1.5A photon has momentum and that the momentum is given by p = E / c• understand that a photon has momentum and that the momentum is given by p = E / cSyllabus objective