QCAA Physics Practice Test

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The smallest discrete packets of energy of electromagnetic waves, also later known as photons.

Protons

Quanta

Light energy is quantized into tiny indivisible units. These units are called quanta, and for electromagnetic radiation, each quantum is a photon. So the smallest discrete packets of EM energy are quanta, which in this context are photons. Protons and quarks are matter particles inside atoms, while neutrinos are very light, weakly interacting particles not related to the energy packets of light.

Quarks

Neutrinos

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