GSC International 75mm Diameter Double-Convex Lens - 20cm Focal Length

welcome to our lecture online and here is a combination lens problem where we are given an object two lenses in this case there are two converging lenses one that has a focal length of 30 centimeters the other one has a focal length of 20 centimeters and we're supposed to find the final image cast by this object due to the two lenses being there now the way you typically want to do that is as follows first draw the ray diagram for the image formed by the first photo from the object here using only the first lens and ignore the presence of the second lens as if it's not there at all all right if we do that it's just like before we draw our first ray from the top of the object to the first lens and at that point the ray is going to be diverge it's going to be change in direction to hit the focal point right here of the first lens this is the focal point of the first lens so the Ray will d