Two objects A and B are placed at 15 cm and 25 cm from the pole in front of a concave mirror having radius of curvature 40 cm. The distance between images formed by the mirror is:
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For concave mirrors, the image distance is positive for real images and negative for virtual images. Use the mirror formula \(\frac{1}{f} = \frac{1}{v} + \frac{1}{u}\) to find the image distance.