Lenses system
I am having some trouble understanding a question involving a lens system, which is as follows:
A 20cm tall object is placed 80cm in front of a 6.75D lens. A second lens of power +3.00D is placed 7.5cm behind the first lens. The lens system is aligned so that the lenses are coaxial.
Calculate the position and size of the image produced, and state the nature of the image.
I first tried treating each lens separately to determine the image position and found a value for the image position di = 50cm for the full system but I'm not sure if this is correct. The nature if I found for the image was that it was virtual, magnified and upright. I am hoping maybe someone can verify my results. Would be a great help indeed
