Lens ------------------------------------------------- Version: 1.0, 971223 Creator: Daniel Bergman. Description: The program calculates the focal distance for lenses. A is the distance object-lens, B is the distance lens-image and F is the focal distance for the lens. Input 0 for the value you want to know. Comments: None. Known bugs: None. Size: 85 bytes. For more games and programs, please visit http://ti80.burtrask.net. PROGRAM:LENS INPUT "A?",A INPUT "B?",B INPUT "F?",F IF F=0 DISP 1/(1/A+1/B IF A=0 DISP 1/(1/F-1/B IF B=0 DISP 1/(1/F-1/A -------------------------------------------------------------------- Copyright (C) 1998 by Daniel Bergman & Mattias Morén http://ti80.burtrask.net