A totally reflecting disk has radius 8. 00 um, thickness 2. 00 um, and average density 7. 00x102 kg/m². A laser has an average power output Pav spread uniformly over a cylindrical beam of radius 2. 00 mm. When the laser beam shines upward on the disk in a direction perpendicular to its flat surface, the radiation pressure produces a force equal to the weight of the disk. Part A What value of Pay is required? Express your answer with the appropriate units. ΜΑ ?
