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. […]
The sun emits different forms of energy in the form of electromagnetic waves. One form is the ultraviolet light which has a shorter wavelength of between 10 to 400 nm than visible light (greater than 400 nm) and a longer wavelength than x-rays (less than 10 nm). Because of its shorter wavelength, ultraviolet light contains […]
Light is a form of energy that allows us to see. And our major source of this energy is the sun. Light is considered Electromagnetic Radiation, which includes infrared rays, ultraviolet and radio waves. Through the ages, scientists have formulated theories on light?s nature. Because of its behavior and observed properties, it has the dual […]
Ultraviolet radiation is a form of energy that travels through space. It lies between the electromagnetic spectrum of x-ray, which is 40 nm and visible light, 400 nm. While there are many artificial sources of UV radiation, the sun is still the primary source of radiation in nature.