The Planck-Einstein relation explains and quantify the amount of energy carried by electromagnetic (EM”) radiations (see our article: What is light?). The energy difference between both ends of EM spectrum can be over 1020 times. Physicists found that part of the EM radiation carries sufficient energy to liberate or remove electron(s) from atoms and turn atoms into ions, i.e., ionizing an atom. This can happen to molecules as well. Gamma rays, X-rays, and the higher ultraviolet part of the EM spectrum are generally considered as ionizing EM radiation; the rest of EM radiations in the EM spectrum are considered as non-ionizing EM radiation.
In physics, light is the smallest quantity of energy that can be transported. A photon, an elementary particle without a real size, cannot be split, only created or destroyed. Light also has a wave-particle duality, being kind of particle and a wave at the same time.
When we are asking ourselves how to properly look after our sunglasses, we’re always come to these two common questions. How should we clean the sunglasses? How to keep the sunglasses from breakage? How to adjust the sunglasses to avoid it look crooked on your face?