CUET Preparation Today
| The sun radiates electromagnetic energy at the rate of $3.9 \times 10^{26}W$. Its radius is $6.96 \times 10^8m$, |
| The intensity of sun light at the solar surface will be: |
$1.4\times 10^4 W/m^2$ $2.8 \times 10^5 W/m^2$ $4.2\times 10^6 W/m^2$ $5.6 \times 10^7 W/m^2$ |
| $5.6 \times 10^7 W/m^2$ |
| $ I = \frac{P}{A} = \frac{P}{4\pi R^2} = \frac{3.9\times 10^26}{4\pi \times (6.9\times 10^8)^2} = 5.6\times 10^7 W/m^2$ |
