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| Application of lenses in optical instruments |
| Formation of the final image by a microscope |
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Object is between F and 2F |
| Image position |
Image is further than 2F |
| Image characteristics |
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Object is between F and the optical centre |
| Image position |
Image is further than F |
| Image characteristics |
- Virtual
- Upright
- Magnified
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| Magnifying Power of Microscope |
| Magnifying power of objective lens X Magnifying power of eyepiece |
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| Formation of the final image by a telescope |
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Objective at infinity |
| Image position |
Image at F |
| Image characteristics |
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Object at F |
| Image position |
Image at infinity |
| Image characteristics |
- Virtual
- Upright
- Magnified
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| The distance between the objective lens and eyepiece |
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\( f_o + f_e\)
where \(f_o\) = focal length of objective lens,
\(f_e\) = focal length of eyepiece
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