The focal lengths of the objective and eyepiece of a microscope are 1.25 cm and 5 cm respectively. Find the position of the object relative to the objective in order to obtain an angular magnification of 30 in normal adjustment.
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The focal lengths of the objective and eyepiece of a microscope are 1.25 cm and 5 cm respectively. Find the position of the object relative to the objective in order to obtain an angular magnification of 30 in normal adjustment.
- Focal length of the objective, Fo = 1.25 cm
- Focal length of the eyepiece, Fe = 5 cm
- Magnification,m = 30
- Least distance of the distinct vision,D = 25 cm
- The position of the object = ?
m = (1 + )
⇒30 = (1 + )
⇒L =
⇒L = 6.25 cm
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Answer:
your answer is6.25
hope it help
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