1 Common rashes include eczema, poison ivy, hives, and athlete's foot. 2  Infections that cause rashes may be fungal, bacterial, parasitic, or viral.  Over-the-counter products may be helpful treatments for many skin rashes.
The conditions under which this process occurs happen in two ways. According to the Cornell Center for... Atoms emit a photon when an electron falls from a high-energy state to a low-energy state. The conditions under which this process occurs happen in two ways. According to the Cornell Center for...
Electron-Positron Pair Production. When a photon has quantum energy higher than the rest energy of an electron plus a positron, one of the ways such as a photon interacts with matter is by producing an electron-positron pair in the field of nucleus.