Chapter 27, Problem 46PCE

Two lenses, with f₁ = +20.0 cm and f₂ = +30.0 cm, are placed on the x axis, as shown in Figure 27-28 An object is fixed 50 0 cm to the left of lens 1, and lens 2 is a variable distance x to the right of lens 1. Find the lateral magnification and location of the final image relative to lens 2 for the following cases: (a) x = 115 cm; (b) x = 30.0 cm; (c) x = 0 (d) Show that your result for part (c) agrees with the relation for the effective focal length of two lenses in contact, 1/f_eff = 1.