Lecture 11 - Lecture 11 Lecture 11 Microscope [Reading...

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Lecture 11 1 © Jeffrey Bokor, 2000, all rights reserved Lecture 11 Microscope [Reading assignment: Hecht 5.7.3, 5.7.5] Simple microscope (magnifier) Simple application of the lens law gives: If the eye is located at the lens, the angle subtended by the image is If the eye views the same object at standard viewing distance (25 cm), then the angle would be The magnifier enlarges the object by the ratio One may adjust the lens to put the image appearing at , which means that it is viewed with a fully relaxed eye, then With the image appearing at 25 cm (standard viewing distance), then  h h object simple lens, f image s s – object located inside lens focal length – virtual image is formed at f s eye h hf s  f ------------------- = h s fs == h 25 ----- = M 25 h -------- 25 f 25 s ----- in cm = M 25 f = M 25 f 1 + =
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Lecture 11 2 © Jeffrey Bokor, 2000, all rights reserved Compound Microscope
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Lecture 11 - Lecture 11 Lecture 11 Microscope [Reading...

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