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The total magnification produced by a co...

The total magnification produced by a compound microscope is 20,while that produced by the eye-piece alone is 5.When the microscope is focussed on a certain object,the distance between objective nad eye-piece is 14 cm.Find the focal length of objective and eye-piece,if distance of distinct vision is 20 cm.

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MODERN PUBLICATION-Optical Instruments-EXERCISE
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  15. An astronomical telescope,when in normal adjustment has magnifying pow...

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  16. A small telescope has an objective lens of focal length 140cm and an e...

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  17. An astronomical telescope,when in normal adjustment has magnifying pow...

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  18. A reflecting type telescope has a large spherical mirror for its objec...

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