Two lenses are mounted in a tube such that the distance between them can be varied. This device can be used as either a telescope or a compound microscope. One lens has a focal length of 27 cm. 

(a) Find the focal length of the second lens such that a telescope made from the two lenses would have the same magnification as a microscope made from the same two lenses. It will be a low-magnification microscope, so you will need to substitute Equation 26.13 for m_{θ, eye} in deriving a result to replace Equation 26.16. 

(b) What is the magnification achieved?