Question
Compound microscope and Astronomical refracting telescope.
✓
Answer
Compound microscope:
- In a compound microscope, the focal length and cross section of the objective lens are respectively smaller than the focal length and cross section of the eyepiece.
- In this case, to observe the object, the distance between the object and the objective lens is adjusted.
- It forms a magnified image of a small object.
- It is used to observe blood corpuscles, plant and animal cells, etc.
Astronomical refracting telescope:
- In an astronomical refracting telescope, the focal length and cross section of the objective lens are respectively greater than the focal length and cross section of the eyepiece.
- In this case, to observe the object, the distance between the objective lens and eyepiece is adjusted.
- It forms a near image of a distant object.
- It is used to observe sateulites, planets, stars, etc.
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