The surface of the Sun is similar in its properties to a completely black body. Maximum spectral radiosity density occurs at a wavelength of 0.5 microns. Determine the temperature of the solar surface and the approximate time for which the mass of electromagnetic waves (all wavelengths emitted by the Sun) would have amounted to 1% of its mass, if the temperature of the Sun has not changed. Take the mass of the Sun and a radius equal to, respectively, 1.98 * 10 ^ 30 kg, and 6.95 * 10 ^ 8 m.

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