Technically, thermal radiation is the heat emitted by anything that is not at absolute zero; absolute zero being the coldest possible temperature where all activity at molecular level stops (also called zero K or roughly -273 degrees C and -460 degrees F). Examples of thermal radiation are sunlight and the light from an incandescent bulb. […]
An Electron is the negatively charged subatomic particle. Electrons can be free, like those travelling in an electric current. They can also be bound to an elemental atom. The symbol generally used for this particle is ?e-.? It is virtually weightless when compared to the protons and neutrons. Studies have shown that its weight is
The Electron Volt (eV) is a unit of measuring energy. Remember that for electrons to move, there must be a potential difference or voltage. The electron volt refers to the gained kinetic energy of a single free electron, as it accelerates in a 1-volt potential difference. One eV is approximately 1.602?10?19 J. For astrophysics, the
You can determine the characteristics of a star by breaking down its light into its components. This collection of colors obtained is called a spectrum, and is useful in determining the elements and other components of stars. We know the spectrum of our own sun whenever we view its spectrum, whenever we see a rainbow.
If you ever wondered how you can determine the elements that make something up, you can do that by subjecting your sample to spectral analysis. This involves breaking it down into its spectrum to determine its chemical composition and properties. Spectral analysis is commonly used to find out the composition of unknown materials and utilize
