An object is placed 30 cm in front of concave mirror of focal length 15cm. At what distance should a screen be placed so that a sharp focused image can be obtained?
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Since the object is placed 30 cm in front of concave mirror of focal length 15cm in other words the object is placed at the centre of curvature of concave mirror so the screen should be placed at the centre of curvature to obtain focus image of the object.
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