In 1926 Gilbert N. Lewis named these light quanta particles photons. For instance, there is an electromagnetic field whose quanta are photons. This causes the wave to display particle-like packets of energy called quanta. Planck called these "lumps" of light energy "quanta" (from a Latin word for "how much"). In a 1905 paper, Einstein postulated that light itself consists of localized particles ("quanta"). Subsequently, Planck tried to grasp the meaning of energy quanta, but to no avail. He explains that energy exists in discrete packets called quanta. The number of point particles is equal to the number of quanta. Neurotransmitters are released into a synapse in packaged vesicles called quanta. Einstein gave the energy content of such quanta in the form . The field quanta of the inflaton field are known as inflatons. Latitude is Dell's business laptop brand, designed and manufactured mainly by Compal and Quanta. Consequently, exocytosis releases acetylcholine in packets that are called quanta. The energy of light quanta depends only on the frequency of the light. Black-body radiation was not explained without the introduction of quanta.