30 The graph shows the variation with wavelength of the intensity of radiation emitted by two bodies of identical shape. I / arbitrary 2.0 units 1.5 1.0 0.5 0 0 0.5 1.0 1.5 2.0 ? / x 10?? m a Explain why the temperature of the two bodies is the same. b The upper line corresponds to a black body. Calculate the emissivity of the other body.
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The graph shows the variation of intensity of radiation with wavelength for two bodies of identical shape. This means that the bodies have the same surface area and are emitting radiation in the same direction. Show more…
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The graphs in Figure 2.15 show the variation with wavelength of the intensity of radiation emitted by two bodies of identical shape. (a) Explain why the temperature of the two bodies is the same. (b) The upper graph actually corresponds to a black body. Calculate the emissivity of the other body.
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