4500HWM01

# 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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