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 ...

The film discusses the law of universal gravitation, primarily based on Sir Isaac Newton's work. It explains how gravity acts as a force that attracts objects towards each other, using a fictional ...