The Nature of Light

In many cases, the properties of light can be explained as a wave, as was shown in Young's double-slit experiment.

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.

Interference and diffraction are terms that describe a wave interacting with something that changes its amplitude, such as another wave.

Max Planck suggested that the energy of light is proportional to its frequency, also showing that light exists in discrete quanta of energy.

The photoelectric effect is the propensity of high-energy electromagnetic radiation to eject electrons from a given material.