Ultraviolet light is incident normally on the surface of the certain substance. The binding energy of electrons in this substance is around 3.44 eV. The incident light consists of an intensity of 0.063 W/m2. The electrons are photo electrically emitted having a maximum speed of 4.4 x 105 m/s. Determine how many electrons are emitted from the square centimeter of the surface each second? Suppose that the absorption of each and every photon emits an electron.