Full Idea
Since the energy of the electromagnetic field can take on only certain values, the field behaves like a set of packets of energy.
Gist of Idea
Because it is quantised, a field behaves like a set of packets of energy
Source
Carlo Rovelli (Reality is Not What it Seems [2014], 04)
Book Reference
Rovelli,Carlo: 'Reality is Not What it Seems', ed/tr. Carnell/Segre [Penguin 2016], p.107
Related Idea
Idea 20461 The basic ideas of fields and particles are merged in quantum mechanics [Rovelli]