The focal length of a concave mirror is f.If an object is placed at a distance x from the principal focus away from the mirror,what is the ratio of the size of the image to the size of the object?(3m)

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Solution

object distance,u=-x+f
Magnification = f/f-u : f/f-f+x = f/x

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The focal length of a concave mirror is f.If an object is placed at a distance x from the principal focus away from the mirror,what is the ratio of the size of the image to the size of the object?(3m)

object distance,u=-x+f Magnification = f/f-u : f/f-f+x = f/x

object distance,u=-x+f
Magnification = f/f-u : f/f-f+x = f/x