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...
The Bohr model for the atom, showing the nucleus and different levels that an electron can occupy. Click here for original source URL. As an electron drops to a lower energy level, it loses energy by emitting a photon. The photon's energy equals the difference in energy between its energy level and the one below it.Electrons in an atom can experience only certain, fixed changes in energy level. For instance, if an electron starts in level 3, it can drop only to level 2 or 1.f the electrons in an atom are in their lowest possible energy level, that atom cannot produce an emission line. This is because the electrons cannot drop to any lower energy level. An atom in which all electrons are in the lowest possible energy level is said to be in its ground state.