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A convex lens is thicker at the centre than at the edges.
Use of Convex Lenses – The CameraA camera consists of three main parts.
The Magnifying GlassA magnifying glass is a convex lens which produces a magnified (larger) image of an object. A magnifying glass produces an upright, magnified virtual image. The virtual image produced is on the same side of the lens as the object. For a magnified image to be observed the distance between the object and the lens must be shorter than the focal length of the lens.
MagnificationThe magnification of a lens can be calculated using the following formula; As this is a ratio between heights it has no units. A magnification of 2 means the image is twice the size of the object and a magnification of 1 indicates an image size being the same as the object size. Concave LensA concave lens is thinner at the centre than at the edges.
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