Answer:
3.958 × 10²⁶ watt
Explanation:
Given:
Distance between earth and sun, [tex]R_e[/tex] = 150 ×10⁸ m
Total solar irradiance at earth orbit = 1400 watt/m²
Now,
Area irradiated ([tex]A_e[/tex]) will be = [tex]4\pi R_e^2[/tex]
⇒ [tex]A_e[/tex] = [tex]4\pi \times (150\times 10^{8})^2[/tex]
⇒ [tex]A_e[/tex] = [tex]2.827\times 10^{23}m^2[/tex]
Therefore, the flux = Total solar irradiance at earth orbit × [tex]A_e[/tex]
the flux = [tex]1400watt/m^2\times 2.827\times 10^{23}m^2[/tex]
⇒the flux = 3.958 × 10²⁶ watt
