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Images Formed by Lenses
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The main lens formula is
1/f = 1/p + 1/q
- f is the focal length, + if the lens is convex (converging), - if the lens is concave (diverging).
- p is the distance of object to lens, + if object is real, - if object is virtual
- q is the distance of image to lens, + if image is real, - if image is virtual.
Images Formed by Lenses
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