1.

We consider a device composed of 2 convergent thin lenses: l1 and l2. The first lens (11) has a focal length f1 = 4 cm and the second lens (12) has a focal length of f2 = 20.0 cm. The distance between the two lenses is 32 cm. The object distance p1 is 5 cm (the object is placed in front of the lens f1 as shown in the figure above). The height of the object is h= 0.04 cm. What is the transverse magnification of the system composed of the two lenses l1 and l2. Remember to use the negative sign if the final image is inverted.

2.

Consider a converging lens that has a focal length of 19 cm. What is the minimum object position (p), in [cm], for which the absolute height of the image yI is twice that of the object, so that |yI| = 2yO.