a concave mirror of focal length 15cm is placed at a distance of 37.5cm from a wall. how far from the wall should an object be placed to get its image on the wall?
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For a concave mirror, the image distance becomes equal to the object distance, i.e., the image is formed at the object position when the object is placed on the centre of curvature for the concave mirror.
So, object distance= radius of curvature.
We know that, for a spherical mirror, radius of curvature=2× focal length.
Given, focal length=25cm
Therefore, object distance= radius of curvature=2×25cm=50cm
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