If the angular magnification of an astronomical telescope is 30 and the diameter of the objective is 65 mm, what is the minimum diameter of the eyepiece required to collect all the light entering the objective from a distant point source located on the axis of the instrument?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.