Answer:
[tex]I_{2}=0.27 W/m^2[/tex]
Explanation:
Intensity is given by the expresion:
[tex]I_{2}=Io (\frac{r1}{r2} )^{2}[/tex]
where:
Io = inicial intensity
r1= initial distance
r= final distance
[tex]I_{2}=10 W/m^2 (\frac{30m}{180m} )^{2}[/tex]
[tex]I_{2}=0.27 W/m^2[/tex]
