The solar spectrum is close enough to the emission spec

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The solar spectrum is close enough to the emission spectrum of an absolutely black body with the most likely wavelength of 0.48 microns. Find the power of thermal radiation from the sun. Estimate the time for which its mass is reduced by one per cent (due to thermal radiation). The mass of the sun 2 * 10 ^ 30 kg, its radius 7 * 10 ^ 8 m.

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Task 50303. Detailed recording solution, formulas and laws used in the decision, the withdrawal of the formula.
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