question_answer

(a) The images formed by a lens is always on the 4 same side of the lens as object. Name the type of lens. (b) A real image and magnified image is formed by a lens. If the object distance is u and image distance is v, then find the distance between object and image. (c) An image formed by a concave lens. If the object distance is u and image distance is v, then find the distance between object and 4 < image. (d) A virtual image is formed by a converging type of lens. If the object distance is u and image distance is v, then find the distance between object and image.

Answer:

(a) Concave. (b) \[v+u\] (c) A concave lens always forms a virtual and diminished image that forms on the same side of the object. Therefore the distance between the object and image is\[u-v\]( since \[u>v\]). (d) A converging lens is a convex lens and it always forms a virtual image that is magnified and that forms away from the object on the same side of the lens. Therefore the distance between object and image is\[v-u\]( since\[v>u\]).