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...
Now when an electron goe from an excited state n1, to a lower state n2 < n1, it has to give up energy per the formula above. It does so by emitting a photon. So the photon can only have energies related by the differences of the inverse of two integers. The energy of a photon is related to its wavelength (color) by: E = hc/wl where h = Planck's constant, c = speed of light and wl = wavelength.