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| Simple Microscope or Magnifying Lens |
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| Magnifying Lens |
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| It consists of a converging lens of small focal length. By keeping the object close to the lens, a virtual, erect and magnified image is obtained as shown |
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| O = optic centre |
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| FO = focal length |
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| AB = object |
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| A1B1 = image |
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| Magnifying power is the ratio of the angle subtended by the image and the object on the eye, when both are at the least distance of distinct vision from the eye |
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| For small angles |
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| and image distance v = -D (distance of distant vision) |
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| Note: As f decreases, m increases. |
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