The total solar irradiance (tsi) at earth orbit is 1400 watts/m2 . assuming this value can be represented as a single poynting flux. find the corresponding flux at the solar visible-light surface. explain your methods.
(distance between sun & earth is 150 million km)

3.958 × 10²⁶ watt

Explanation:

Given:

Distance between earth and sun, = 150 ×10⁸ m

Total solar irradiance at earth orbit  = 1400 watt/m²

Now,

Area irradiated () will be =

⇒ =  

⇒ =  

Therefore, the flux = Total solar irradiance at earth orbit ×

the flux =  

⇒the flux = 3.958 × 10²⁶ watt

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue