the magnification produced by a spherical lens is +7.2 What (a)nature of lens (b) nature of image?
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According to the above data the image is formed at infinity.

As shown in the diagram, AB is the object placed at focus of the concave mirror. Now to find the position of image in a concave mirror we draw rays as mentioned in the diagram above. It is observed that the two rays are parallel to each other. Hence they meet at infinity. And we know that position of image is the point where these two rays meet. Therefore, the image so formed is at infinity.

As shown in the diagram, AB is the object placed at focus of the concave mirror. Now to find the position of image in a concave mirror we draw rays as mentioned in the diagram above. It is observed that the two rays are parallel to each other. Hence they meet at infinity. And we know that position of image is the point where these two rays meet. Therefore, the image so formed is at infinity.
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