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Text File  |  1993-10-20  |  2KB  |  16 lines

  1. "AST1CAL3 EQUATION VARIABLE","10-20-1993","21:40:03"
  2. "OBJECT_DISTANCE=S[O]+(1-SIGN(ABS(S[O])))*S[I]*-.5*R/(S[I]+R/2) IMAGE_DISTANCE=S[I]+(1-SIGN(ABS(S[I])))*S[O]*-.5*R/(S[O]+R/2) RADIUS=R+(1-SIGN(ABS(R)))*-2*S[O]*S[I]/(S[I]+S[O]+1E-30) FOCUS=-RADIUS/2 MAGNIFICATION=-IMAGE_DISTANCE/(OBJECT_DISTANCE+1E-30)"
  3. "SPHERICAL REFRACTING MIRRORS, PARAXIAL RAYS.                     A diagram of the Problem is shown below. Mirror is represented by 's'.                                  s                                                                           · o·                    S = source object                                ·  °    s °                    V = vertex of sphere                      ·  °          s   ° P     C           P = image (between F and C)       S ·°· · · · · · · · ·o· · ·°o · · o           R = 2 * F                         |                   V|s     |  ·°                                               |                    | s   ·|°  R      S[O] = distance S to vertex              |                    |  s°  |         S[I] = distance vertex to image           |-------S[O]---------|-S[I]-|         C = center of sphere R = radius curvat.                                        (c) Copyright PCSCC, Inc., 1993            Sign Convention: S[O] + means its left of vertex V     focus + means concave                     S[I] + means its left of vertex V     focus - means convex                      R    + means center C is right of V                            *** Answer(s) to problem ***                                                    Variables are set to proper values at entry.  Note, value of unknown should be  set to 0.0.  Enter any 2 of 3 knowns, program calculates missing (=0) one.      Object distance is -5.96 cm, to right of V  (b) Image is not inverted and       minified by 0.29 times original height.                                                        ||A convex mirror (17 cm radius) casts the image of a bird on a  screen 20 cm distant. (a) Where is the bird located and (b) what will it look   like?  Type comma key to see answer. Type (F2) to return to application file."
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