翻譯作業

In electromagnetic radiation, another form of kinetic energy, energy travels in form of a wave as a result of the changes in electric and magnetic fields. There are many different form of electromagnetic radiation, each having a different wavelength (distance between successive peaks or troughs in the wave) and energy content. Form of electromagnetic radiation such as gamma rays (emitted by some radioactive isotopes, figure 2-5 top), X rays, and ultraviolet (UV) radiation with short wavelengths have a higher energy content than forms such as visible light and infrared (IR) radiation with longer wavelengths. Visible light makes up most of the spectrum of electromagnetic radiation emitted by the sun (figure 2-6).



在電磁輻射(動能的另一種形式)中，由於電場與磁場的變化，能量以波浪的形式流動。電磁輻射有很多種形式，每一種皆有不同的波長(波峰到波谷之間的距離)和內含的能量。電磁輻射的形式例如伽馬射線(由某些放射性同位素釋放，上圖2-5)或X光或短波長的紫外輻射(UV)比起長的波長例如可見光及紅外輻射(IR)有較高的能量。太陽散發的多數电磁辐射光譜皆是由可見光組成。