Photon (Wikipedia)
A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) ’light’) is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless particles that always move at the speed of light when in vacuum. The photon belongs to the class of boson particles.- Simon Schwendener (Wikipedia)
Simon Schwendener (10 February 1829 – 27 May 1919) was a Swiss botanist who was a native of Buchs in the Canton of St. Gallen.