Concept 10.2 The light reactions convert solar energy to the chemical energy of ATP and NADPH The thylakoids convert light energy into the chemical energy of ATP and NADPH. Light is a form of electromagnetic radiation. Like other forms of electromagnetic energy, light travels in rhythmic waves. The distance between crests of electromagnetic waves is called the wavelength. Wavelengths of electromagnetic radiation range from less than a nanometer (gamma rays) to more than a kilometer (radio waves). The entire range of electromagnetic radiation is the electromagnetic spectrum. The most important segment for life is a narrow band between 380 to 750 nm, the band of visible light. While light travels as a wave, many of its properties are those of a discrete particle, the photon. Photons are not tangible objects, but they do have fixed quantities of energy. The amount of energy packaged in a photon is inversely related to its wavelength.
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.