An electron moving in a horizontal direction with speed of 5x10^7 mls enters a region where there is uniform electric field of 20 V/cm directed upward in the plane of its motion. Calculate the direction of its motion after 4x 10-85. Assume e/m=54.8 x 10" c/kg. ​

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?