An object of 7 cm in size is placed at 27 cm in front of concave mirror of focal length 18 cm . At what distance from the mirror should a screen be placed in order to obtain a sharp focused image?find the nature and size of the image
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An object of size 7.0 cm is placed at 27 cm in front of a concave ...
An object of size 7.0 cm is placed at 27 cm in front of a concave ...
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