“The photon is a type of elementary particle. It is the 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 so they always move at the speed of light in vacuum, 299792458 m/s.”
Source:
[1] Wikipedia Contributors. “Photon.” Wikipedia, Wikimedia Foundation, 8 Nov. 2020, en.wikipedia.org/wiki/Photon. Accessed 23 Nov. 2020.
[2] monicore. “Christmas Decoration Holiday – Free Image on Pixabay.” Pixabay.com, 2 Nov. 2017, pixabay.com/illustrations/christmas-decoration-holiday-xmas-2908901/. Accessed 23 Nov. 2020.