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Question
What is a simple microscope or a magnifying glass? Draw a ray diagram to show its function.
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Solution

A convex lens works as a simple microscope or a magnifying glass when an object is kept between its optical centre and the focus. The image of the object so obtained is virtual, upright, and magnified.
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The following diagram shows an object AB and a converging lens L with foci F1 and F2. Draw two rays from the object AB and complete the diagram to locate the position of the image CD. Also mark on the diagram the position of eye from where the image can be viewed.

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