Question

magnification of a lens is +3.Identify lens and image properties draw ray diagram for this situation​​

Answer 1

The magnification produced by a lens is defined as ratio of the height of the image to the height of the object. The magnification produced by a lens is equal to the ratio of image distance to the object distance.

When the object is placed between 2F and F then the image is real, inverted and enlarged.

When the object is placed between F and the optical centre, the image is virtual, erect and enlarged.

Answer 2

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Explanation:

P=+3D

P=1/F

F=1/3=0.333m

F=33.3

focal lenght is positive

so it is a convex lens

and it is placed between F and optical centre