An electron is ejected horizontally at a speed of \(1.5 \times 10^{6} \mathrm{~m} / \mathrm{s}\) from the electron gun of an old computer monitor. If the viewing screen is \(35 \mathrm{~cm}\) from the end of the gun, how far will the electron travel in the vertical direction before hitting the screen? Based on your answer, do you think designers need to worry about this gravitational effect?