When a 5 amperes current passing through a metallic rod residing along positive y-axis. What is the magnetic force per unit
length on rod with its direction, If a continuous B=0.30 tesla is
operated along positive x-axis

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?