In the displacement method , a convex lens is placed in between an object and a screen . If one of them magnification is 3 and the displacement of the lens between the two positions is 24 cm , then the focal length of the lens is :-

In the displacement method a conves lens is placed in between an object and a screen. If the magnificaiton in the two position are m_(1) and m_(2) ( m_(1) gt m_(2) ), and the distance between the two positions of the lens is x, the focal length of the lens is

If the distance between the screen and object is 50 cm and the displacement of the lens is 10 cm,clculate the focal length of the lens.

A convex lens of focal length f is placed somewhere in between an object and a screen. The distance between the object and the screen is x . If the numerical value of the magnification produced by the lens is m , then the focal lnegth oof the lens is .

A convex lens of focal length f is placed somewhere in between an object and a screen. The distance between the object and the screen is x . If the numerical value of the magnification produced by the lens is m , then the focal lnegth oof the lens is .