Radiation and its law
all the objects found in nature, as long as the temperature is above absolute zero temperature, are always kept in the form of electromagnetic waves to transmit heat, this way of transmitting energy called radiation. The energy by radiation produced by, known as radiant energy, or radiation.
the characteristics of the radiation has an important, is that it is 'equivalent'. No matter the objects, Gas) Temperature is outward radiation, a object to b radiation, b can also be used to a radiation at the same time. This is different from the conduction and conduction is a one-way.
when the radiant energy absorbed by the body material thermal effect, absorb the radiant energy of different object, the temperature is different. Therefore, an important way to radiation is converted into heat energy.
radiation is outward in the form of electromagnetic radiation. Energy in the form of wave propagation. The radio waves and light waves are electromagnetic waves. They spread quickly and spread speed and light in a vacuum ( 3 x 1010 cm/SEC) The same, in the air a bit slower.
the electromagnetic wave is made up of waves of different wavelengths composite wave. Its wavelength range from 10 e - 10 microns ( E = 10-1 micron 4 cm) The cosmic ray to the wavelength of a few kilometers of radio waves. Υ rays, X rays, ultraviolet, visible, infrared, ultrashort wave and long wave radio waves belong to the range of electromagnetic waves. Visible to the naked eye is a short of electromagnetic waves, from 0. 4 - 0. This part is called visible light 76 microns. Visible light after prism spectrometer, become a red, orange, yellow, green, green, blue, violet seven kinds of color of light, the light is called a spectrum. The red light wavelengths the longest, shortest wavelength violet light, other each wavelength of light between them in turn. A longer wavelength than red light,> 0. 76 microns) There are infrared radio waves; In the purple light (shorter wavelength