368 Image FormationP36.54(a)The lensmaker’s equation111pq f+=givesqfp pffpfppf=−=−=−1111bg.Then,Mhhqpf=′=− =−−gives′=−hhffp.(b)For >>, fp p−≈−. Then,′= −hhfp.(c)Suppose the telescope observes the space station at the zenith:′=−=−×hhfp108 64 00407 101073...m mmmmafaf.P36.55(b)Call the focal length of the objective foand that of the eyepiece −fe. The distance betweenthe lenses is ffoe−. The objective forms a real diminished inverted image of a very distantobject at qfo1=. This image is a virtual object for the eyepiece at e2.For itbecomes−−
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