A biconvex lens with an object at 2 F. Rays are drawn both parallel to the principal axis and through the center of the lens. The ray parallel is bent through the focal point on the image side of the lens. The ray straight through the center of the lens is not bent. The rays converge at the image at 2 F on the image side of the lens that is inverted and the same size as the object. What are the characteristics of the image formed by the object?
ANSWER
The image created by the object is located on 2F behind the lens, real, inverted, and the same size as the actual object.

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.