1038_Physics ProblemsTechnical Physics

1038_Physics ProblemsTechnical Physics - Chapter 36 *P36.78...

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Chapter 36 379 *P36.78 The first lens has focal length described by 1 1 11 1 1 1 1 11 12 1 1 f n RR n R n R =− F H G I K J F H G I K J bg . For the second lens 1 1 1 21 2 2 21 22 2 2 f n n n R F H G I K J + F H G I K J =+ . Let an object be placed at any distance p 1 large compared to the thickness of the doublet. The first lens forms an image according to 111 pq f += 1 1 1 1 1 1 q n Rp = −+ . This virtual q 1 0 < image is a real object for the second lens at distance . For the second lens 222 f 1 22 1 1 1 1 1 2 2 2 2 1 1 1 q n n Rq n R n nn = −= + −− . Then 12 R so the doublet behaves like a single lens with 1 f R = . ANSWERS TO EVEN PROBLEMS P36.2 458 . m P36.22 482 c m P36.4 see the solution P36.24 see the solution; real, inverted, diminished P36.6 (a) ph 1 + ; (b) virtual; (c) upright; (d) +1; (e) No P36.26 200 . P36.8 at q 0267 m virtual upright and diminished with M = 00267 . P36.28 20 0 cm P36.30 (a) q = 40 0 . cm real, inverted, actual size M 100 .; P36.10 at 333 m from the deepest point of the
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