22.5.16) Laser eye surgery uses a laser that focuses a 1.25 ns pulse at a point with a diameter of 32.0 µm.
 What is the intensity of this beam if the pulse corresponds to 2.75 mJ of energy? 
How much energy (in eV) falls on a molecule with a diameter of 0.650 nm during a pulse, when it is irradiated by this laser beam?