Fig. 5.40 shows the plot of the function g (x) representing a fraction of the total power of thermal radiation falling within the spectral interval from 0 to x. Here x = λ/λm (λm is the wavelength corresponding to the maximum of spectral radiation density). Using this plot, find:
(a) The wavelength which divides the radiation spectrum into two equal (in terms of energy) parts at the temperature 3700 K;
(b) The fraction of the total radiation power falling within the visible range of the spectrum (0.40-0.76 m) at the temperature 5000 K;
(c) How many times the power radiated at wavelengths exceeding 0.76μtm will increase if the temperature rises from 3000 to 5000 K.

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