Question

In this problem, we will examine the construction of an astronomical telescope. The eguations for the construction of the scope are simple, but. you should concentrate on understanding the purpose of each of the lenses used in this telescopie. You are stranded in the rocky mountains after your Greyhound bus breaks down. Fortunately for you, the television hero, McGyver is also on your bus. Borrowing the. lenses from two peoples reading glasses, McGyver plans to construct a simple astronomical telescope to survey the terrain in the valley below for help. The two lenses at his disposal are a+1.50 diopter lens and a+20.0 diopter lens (a) Determine the focal length of each lens. Briely explain which lens should be used as the objective lens and which lens should be used as.the eye-piece lens. If McGyver were to use these two lenses to construct an astronomical telescope, approximately how far ld he need to place the two lenses in order to see distant objects clearly? Draw à simple diagram showing the position of each lens and briefly describe the function of each lens, (what does each lens d o 7). Determine the angular magnification of his makeshift telescope if he views distant objects. objects he sees appear to be right-side-up or up-side-down ? Will the

Answer 1

ǐ , olhemnine.focal huich o objechve k which one as focal lungth (Gn mehe) 2.ラ0.osm

we know this telaache has tuo cenvex - to o Je e C adoui hon cal Oangth tus os es

0%der er Aru3 maan cah'on(M) = 13.4 and utside danm ie inverted image