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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My book answer is: There is only one convex lens in simple microscope which produces virtual,erect and magnified image when object distance is less than focal length.IN this case,real rays are diverged more.Thus, eye is to be placed very close to lens so all rays diverged by lens enter eyes and hence image will be brighter. How can we get diverging rays from convex lens?? $\endgroup$ |