If an object is placed at some distance from the concave mirror it's 2times larger real image is formed . If the object is shifted 3cm towards the mirror than its image is 3times larger real is formed . Find the focal length of mirror.
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(a)We have to find the focal length of the mirror. Therefore, the distance of the image 'v' is −60 cm. Thus, the focal length of the concave mirror is 15 cm. (b) Now, if the image is virtual and 3 times magnified, then we have to find the position of the object
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