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The intensity of salr radiation just out...

The intensity of salr radiation just outside the earth's atmosphere is measured to be `1.4 kW//m^2`. If the radius of the sun `7xx10^8m`, while the earth-sun distance is `150xx10^6km`, then find
i. the intensity of salr radiation at the surface of the sun.
ii. the temperature at the surface of the sun assuming it to be a black body,
iii. the most probable wavelength in solar radiation.

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