4500HWM01 - Microscope Construction A microscope is to be...

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Unformatted text preview: Microscope Construction A microscope is to be constructed from an existing available microscope objective and eyepiece. The microscope objective has engraved markings on it as follows: “Plan” and “10 / 0.25” and “160 / 0.17.” The eyepiece has engraved markings on it as follows: “R10X.” The field stop in this Ramsden eyepiece is 17.5 mm in diameter. The outside of the eyepiece tube is a standard 23.2 mm diameter. Calculate, showing all work, the focal length of the objective. Express your an- swer in mm accurately to three significant figures. Calculate, showing all work, the focal length of the eyepiece. Specify the length of microscope tube (from back focal plane of object to front focal plane of eyepiece) intended for this objective and eyepiece. Express your answer in mm accurately to three significant figures. Calculate, showing all work, the angular magnification of the resulting microscope. Calculate, showing all work, the diameter of the magnified area that is seen when viewing through the microscope. Ex- press your answer in um accurately to three significant figures. Put your answers in the spaces provided below. Focal length of objective r: mm Focal length of eyepiece = ' mm Length of microscope tube = . mm Angular magnification of microscope = Diameter of area seen through the microscope = ,um Microscope Construction The linear magnification of the objective is L —— = —10.0 f0 m0: Since L = 160 mm, then f0 = 16.0 mm. I The eyepiece adjusted for infinity focus has anglular magnification Me : 250mm 2 10.0 fe and so f6 = 25 mm Length of microscope tube 2 160 mm. Angular magnification of microscope, M 2 mo Me = (10)(10) = 100 The field stop has d = 17.5 mm and it located at the image plane of the objective. The diameter of the field viewed is d D=——=1750 m , 11m ...
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4500HWM01 - Microscope Construction A microscope is to be...

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