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...
A laser emits photons. Photons (from Greek ÏÏÏ, meaning light), in many atomic models in physics, are particles which transmit light. In other words, light is carried over space by photons. Photon is an elementary particle that is its own antiparticle. In quantum mechanics each photon has a characteristic quantum of energy. Photons have a rest mass of 0 (zero).