It is native to North America, Mexico and Central America, and it is NOT venomous. The Red-bellied black snake (Pseudechis porphyriacus) is considerably larger, and can reach 1.5 to 2.5m in length. It is native to Eastern Australia and is venomous.
Emission of Light. An overview of light emission. Light can be produced by matter which is in an excited state and as it will be shown excitation can come from a variety of sources. The atoms and molecules that make up matter typically emit light at characteristic energies. The light emission can be spontaneous or stimulated.
Light is composed of electric and magnetic fields and thus its alternate name electromagnetic spectrum. Light can be absorbed and emitted by atoms and molecules. The precise details of which give us the world we see around us. Chemists are interested in the details of absorption and emission of light by matter because these details can be viewed as fingerprints of atoms and molecules as well as their chemical properties.