More Radiation laws The situation where you ha ve a continuous spectrum is particularly interesting. To produce such a spectrum an object must be a hot solid object - or at least close enough that it appears solid for the most part. If it is a perfect emitter and absorber of radiation, we call it a black body. As if I haven't already stressed this enough, in nature, objects are not perfect, so there are no true black bodies out there, though some objects are close enough that we can use the laws of black bodies to help determine other characteristics of these objects. One of the laws has to do with the way that energy is emitted by a black body. The energy outputs for different temperature black bodies are shown in Figure 9. Figure 9. Several energy output curves for blackbodies. The amount of energy given off at different wavelengths is shown. Note how the curves all peak at just one wavelength. This peak corresponds to the dominant type of light that is given off by the black body. You might note that there is a peak for
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