The accelerating voltage that is applied to an electron gun is 80 kV, and the horizontal distance from the gun to a viewing screen is 0.21 m. What is the deflection caused by the verti- cal component of the Earth's magnetic field of strength 4 x 10- T, assuming that any change in the horizontal component of the beam velocity is negligible. The elemental charge is 1.60218 x 10-9 C and the electron's mass is 9.10939 x 10-31 kg. Answer in units of m