"COMPOUND THIN LENSES, MAGNIFICATION, FRONT BACK FOCAL LENGTHS. S[I] ≡ Distance from lens #2 to rear image. M[T] ≡ Total magnification, M[T] = M[T1] * M[T2] FRONT_FO ≡ When S[I]=∞, distance in front of lens #1 BACK_FOC ≡ When S[O]=∞, distance behind lense #2 DIOPTRIC ≡ Dioptric power = 1/f1 + 1/f2 D ≡ Distance bewteen two thin mirrors. F1 ≡ Focal length of lens #1 in front of it. F2 ≡ Focal length of lens #2 behind it. S[O] ≡ Distance from lens #1 to front object. *** Answer(s) to problem *** (c) Copyright PCSCC, Inc., 1993 Variables are set to proper values at entry. (a) M[T]=-1.67. Image is real, 40 cm beyond back lens, inverted and magnified by 1.6 times. (b) Move Cursor to D. Type S. For name, type (end esc) M[T] (enter). For its value, type (end esc) -1 (enter). Use default range, type (enter). For a unity magnification of -1, D=120. Type any key to exit. ||A compound lens consists of two bi-convex lenses of focal lengths 15 and 30 cm, respectively, separated by 60 cm. (a) Describe the image generated by a statue 10 cm tall placed 12 cm in front of the first lens. (b) What separation distance is required for unity magnification. Type comma key to see answer. Type (F2) to return to application file."
