The table below can be used to find the correction for distance such as in the case of distances quoted in noise measurement specifications, assuming ideal conditions. Take the given distance on the ...

The relationship between irradiance, \(I\), and distance, \(d\), can be shown to follow an inverse square law. \(I=\frac{k}{d^{2}}\) The product of irradiance and the square of the distance from ...

A lamp illuminates a screen of area \(2.0m^{2}\), which is \(4 m\) away. The irradiance at the screen is \(0.02Wm^{-2}\). a) Calculate the power of the incident beam. b) If the screen is moved to ...