P pidepiper7 New member Apr 25, 2009 #1 A source of light illuminates a surface 8 meters away with an intensity of 14 watts/meter^2. what would the intensity be at 3 meters
A source of light illuminates a surface 8 meters away with an intensity of 14 watts/meter^2. what would the intensity be at 3 meters
H How the End Always Is... Guest Apr 25, 2009 #2 Intensity = P/4πr^2 Solve for power, you know the intensity and distance. 14 W/m^2 = P/4π(8)^2 P = 1.13 x 10^4 W Calculate intensity at 3 meters: I = (1.13 x 10^4)/(4π(3)^2) I = 1.28 x 10^6 W/m^2
Intensity = P/4πr^2 Solve for power, you know the intensity and distance. 14 W/m^2 = P/4π(8)^2 P = 1.13 x 10^4 W Calculate intensity at 3 meters: I = (1.13 x 10^4)/(4π(3)^2) I = 1.28 x 10^6 W/m^2
