Photons

In this paper they made the remarkable prediction that radiation (in the form of photons) from the very hot stages of the universe should still be around today.

LightSail 2 is the latest demonstration of solar sail technology, which uses the gentle pressure of photons — the particles of light — on a lightweight, reflective surface to propel a craft through space, similar to the way the wind pushes a sailing ship across the ocean.

When you see something, your visual system absorbs light—photons—and your brain processes the view into something you can understand and, perhaps, act upon.

Like photons from a light source, electric motors wastefully radiate magnetic energy in all directions.

Gamma rays are composed of very energetic photons.

The force carriers for gravity are hypothetical things called gravitons, for electromagnetism they're the photons.

The physics of the laser may be complex. Still, it is just a story of how electrons interact with light. When a light particle, or photon, hits an electron, the electron jumps to a higher energy state. If another photon strikes one of these high-energy electrons, the electron releases two photons that travel together at the same wavelength. When this process is repeated enough, lots of organized, or coherent, photons are produced.