Question

(i) Draw a neat labelled diagram of a compound microscope explain briefly its working (ii) Why must both the objective and eyepiece of a compound microscope have short focal length?​

Answer 1

Explanation:

Suppose a small object AB is placed slightly away from the first focus F0' of the objective lens. The objective lens forms the real, inverted and magnified image A'B', which acts as an object for eyepiece. The eyepiece is so adjusted that the image A'B' lies between the first focus Fe' and the eyepiece E. The eyepiece forms its image A'' B'' which is virtual, erect and magnified. Thus the final image A'' B'' formed by the microscope is inverted and magnified and its position is outside the objective and eyepiece towards objective lens. Magnifying power of compound microscope is for final image at distance of distinct vision for final image at infinity (ii) For large magnifying power, f0 and fe both have to be small.

Answer 2

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Compound Microscope: Compound microscope is commonly used in the Science laboratories to observe tiny objects. It uses glass lenses and visible light for observation. Magnification power of compound microscope ranges from 100-1500 times.

$\huge\dag\sf\green{By \: Divyanshu}$