The intensity of solar 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.

Explanation

Let's solve the problem step by step.

### Given Data:
- Intensity of solar radiation just outside the Earth's atmosphere, \( I_{e} = 1.4 \, \text{kW/m}^2 = 1.4 \times 10^3 \, \text{W/m}^2 \)
- Radius of the Sun, \( R_{s} = 7 \times 10^8 \, \text{m} \)
- Distance from the Earth to the Sun, \( d = 150 \times 10^6 \, \text{km} = 150 \times 10^9 \, \text{m} \)

### Part (i): Intensity of Solar Radiation at the Surface of the Sun
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