An angular magnification (magnifying power) of 30X is desired using an objective of focal length 1.25cm and an eyepiece of focal length 5cm. How will you set up the compound microscope?

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Focal length of the objective lens,= 1.25 cm Focal length of the eyepiece, fe = 5 cm Least distance of distinct vision, d = 25 cm Angular magnification of the compound microscope = 30X Total magnifying power of the compound microscope, m = 30 The angular magnification of the eyepiece is given by the...
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Focal length of the objective lens,= 1.25 cm Focal length of the eyepiece, fe = 5 cm Least distance of distinct vision, d = 25 cm Angular magnification of the compound microscope = 30X Total magnifying power of the compound microscope, m = 30 The angular magnification of the eyepiece is given by the relation: The angular magnification of the objective lens (mo) is related to me as: = m Applying the lens formula for the objective lens: The object should be placed 1.5 cm away from the objective lens to obtain the desired magnification. Applying the lens formula for the eyepiece: Where, = Image distance for the eyepiece = −d = −25 cm = Object distance for the eyepiece Separation between the objective lens and the eyepiece Therefore, the separation between the objective lens and the eyepiece should be 11.67 cm. read less
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