A concave lens has focal length of 15 cm. At what distance should an object from the lens be placed so that it forms an image at 10 cm from the lens ? Also, find the magnification of the lens.

A concave lens has focal length of 20 cm . At what distance from the lens a 5 cm tall object be placed so that it forms an image at 15 cm from the lens? Also, calculate the size of the image formed.

A convex lens has focal length of 30cm. Calculate at what distance should the object be placed from the lens so that it forms at 60 cm on the other side of the lens ? Find the magnification produced by the lens in this case.

A magnifying lens has a focal length of 10 cm. (a) Where should the object be placed if the image is to be 30 cm from the lens ? (b) What will be the magnification ?

(a) A magnifying lens has a focal length of 10 cm, (a) Where should the object be placed if the image is to be 30 cm from the lens ? (b) What will be the magnification ? (b). A pin length 2.00 cm is placed perpendicular to the principal axis of a converging lens. An inverted image of size 1.00 cm is formed at a distance of 40.0 cm fromthe pin. Find focal length of the lens and its distance from the pin.

An object is placed at 10 cm from a lens and real image is formed with magnification of 0.5. Then the lens is