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P-1 Lenses — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-1 Lenses3 Marks
Question
Compound microscope and Astronomical refracting telescope.
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Answer

Compound microscope:

  1. 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.
  2. In this case, to observe the object, the distance between the object and the objective lens is adjusted.
  3. It forms a magnified image of a small object.
  4. It is used to observe blood corpuscles, plant and animal cells, etc.

Astronomical refracting telescope:

  1. 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.
  2. In this case, to observe the object, the distance between the objective lens and eyepiece is adjusted.
  3. It forms a near image of a distant object.
  4. It is used to observe sateulites, planets, stars, etc.

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