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.
Emission And Absorption Lines. The emission and absorption are due to the transition of the electrons between the energy levels inside the system. It can be in a gas or in a system. And the next question is that the change in the temperature varies change in the emission radiation wavelength. So looking at the radiation wavelength, the temperature can be interpreted.