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A 2.0 cm high object is placed at a distance of 20 cm from a concave mirror. A real image is formed 40 cm from the mirror. Calculate the focal length of
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![A concave mirror produces three times magnified real image of an object placed at 10 cm in front... - YouTube A concave mirror produces three times magnified real image of an object placed at 10 cm in front... - YouTube](https://i.ytimg.com/vi/PdViPlr9EHU/maxresdefault.jpg)
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At what distance in front of a concave mirror of focal length 10 cm, an object be placed so that its real image of size five times that of the object is
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A convex lens has a focal length of 10 cm . At what distance from the lens should the object be placed so that it gives a real and inverted image 20
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