1027_Physics ProblemsTechnical Physics

1027_Physics ProblemsTechnical Physics - 368 Image...

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368 Image Formation P36.54 (a) The lensmaker’s equation 111 pq f += gives q fp pff p fp pf = = = 1 11 1 bg . Then, M h h q p f = =− =− gives ′= h hf fp . (b) For >> , fp p −≈ . Then, ′= − h hf p . (c) Suppose the telescope observes the space station at the zenith: ′=− =− × h hf p 108 6 4 00 407 10 107 3 .. . m m m mm af a f . P36.55 (b) Call the focal length of the objective f o and that of the eyepiece f e . The distance between the lenses is ff oe . The objective forms a real diminished inverted image of a very distant object at qf o 1 = . This image is a virtual object for the eyepiece at e 2 . For it becomes
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