The magnification of an object placed it front of a convex lens of focal length `20cm` is `+2`. To obtain a magnification of `-2` , the object will has to be moved a distance equal to

The magnification of an object plac ed in front of a convex lens of focal length 20 cm is +2. to obtain a magnification of -2. the object will have to be moved a distance equal to

The magnification of an object plac ed in front of a convex lens of focal length 20 cm is +2. to obtain a magnification of -2. the object will have to be moved a distance equal to

The linear magnification of an object placed on the principal axis of a convex lens offocal length 30cm is found to be +2. In order to obtain a magnification of -2, by how much distance should the object be moved?

Where should an object placed from a conveging lens of focal length 20 cm,so as to obtain a real image of magnification 2?

Distance of an object from a concave lens of focal length 20 cm is 40 cm. Then linear magnification of the image

Distance of an object from a concave lens of focal length 20 cm is 40 cm. Then linear magnification of the image

An object is placed at 10 cm from a convex lens of focal length 12 cm. Find the position, nature and magnification of the image.

A convex lens of focal length 15 cm produces a magnification of +4 . The object is placed: