For which position of the object, magnification of convex lens is -1.(minus one) ?

At which position will you keep an object in front of a convex lens to get a real image smaller than the object ? Draw a figure.

At which position will you keep an object in front of a convex lens to get a real image of the same size as the object ? Draw a figure .

A convex lens is placed between an object and a screen which are at a fixed distance apart for one position of the lens. The magnification of the image obtained on the screen is m_(1) . When the lens is moved by a distance d the magnification of the image obtained on the same screen m_(2) , Find the focal length of the lens.

Magnification of the lens is always positive for __

(a) The linear magnification of a concave lens is always positive. Why? (b) The linear magnification of a convex lens may be positive or negative. Why ?

Graph of position of image vs position of point object from a convex lens is shown. Then, focal length of the lens is

An object of height 1cm is set at angles to the optical axis of a double convex lens of optical power 5D and 25cm away from the lens. Determine the focal length of the lens, the position of the image. The linear magnification of the lens, and the height of the image formed by it.

For what position of an object a real, diminshed image is formed by a convex lens?