Determine the magnitude of the electrostatic force on a 0.06000 C charged object when it is placed in an electric field of magnitude 1500 N/C

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?