A beam of light travelling along x-axis is described by the magnetic field, B_z = 5.2 x 10^-9T sin omega (t-x/c). The maximum electric forces on alpha particle moving along y-axis with a speed of 3×10^7m/s, is n x 10^-19 N. The value of n is (charge on electron =1.6×10^-19C) A beam of light travelling [...]