Answer:
The answer is "[tex]1802.1978 \ \frac{w}{m^2}[/tex]"
Explanation:
The Solar radiation reaches the earth surfaces is given by
[tex]I=Isc(1+0.033 \cos \frac{360.(n)}{365.25})[/tex]
where n is number of days in years
n for 6 September 2021:
[tex]\to n= 31+28+31+30+31+30+31+31+6\\\\\to n= 249[/tex]
[tex]\to I=Isc(1+0.033 \cos \frac{360 \alpha 249}{365.25})\\\\\to I=1800(1+0.033(+0.037))\\\\\to I =1800(1.001221)\\\\\to I=1802.1978 \ \frac{w}{m^2}[/tex]
