1. Wave and Particle Descriptions of Laser Light A 5 mW HeNe laser emits photons of a single wavelength 632.8 nm in a beam of light in a vacuum. The beam diameter diverges slightly and at a distance 3 m from the laser output, the diameter of the beam is 2 mm. (a) Determine the energy (in eV) of one HeNe laser photon. (b) Determine the intensity (in W/m) of the laser beam at the point that is 3 m from the laser output, along the direction of the beam. (c) Determine the photon flux (number of photons per unit area) at the point that is 3m from the laser output, along the direction of the beam. (d) If instead one uses the electromagnetic wave model of light, deter- mine the amplitude of electric field in N/C at the point 3m from the laser output, along the direction of the beam.