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To find the best position of a lens to give the best magnification.
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GCSE Physics Coursework: Lenses Experiment Aim To find the best position of a lens to give the best magnification. Theory There are two basic types of lenses, convex lenses and concave lenses. A convex lens is also called a converging lens and a concave lenis is also called a diverging lens. Convex lenses are thicker in the middle than at the edges and concave are thinner in the middle than at the edges, which is exactly the opposite. The diagram below shows some examples of both types of lenses. Diagram 1 If a beam of light is directed parallel at a convex lens then the light is brought to focus by the lens. If the beam of light is directed along the lens axis (the line through the centre of each surface), the rays are brought to a focus on the axis at the focal point of the lens. The focal length (f) of a...
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