Unformatted text preview: works by first placing an object a distance Do from the objective. The observer has a particular value of their NP. Given an objective lens and an eyepiece, the observer adjusts the distance Di to get a sharp image. The total magnification is given by the equation above: 1
1
1
+
=
Do Di fobj
Di = fobj Do
Do ! fobj M obj M eyepiece = ! Do
NP
Do ! fobj feyepiece Textbook Example 27
5: NP = 25 cm fobj = 1 cm = 0.01 m (+100 diopter) feye = 2.5 cm = 0.025 m (+40 diopter) Do = 1.1 cm Do
NP
M obj M eyepiece = !
= !110 Do ! fobj feyepiece...
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 Spring '14
 DI, Eyepiece, obj M eyepiece

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