Since L = 1/l(m) F=1/f(m) and L’ = 1/l’(m)ġ/l(m) + 1/f(m) = 1/l’(m) or Lensmakers Equation used in this video. The reciprocal of incoming L vergence is l or object distance, lens F reciprocal is focal length, and the reciprocal of exiting vergence of image L’ is image distance. The object ray here has an incoming minus or negative vergence L in Diopters (D), strikes F, a +4.00lens, and then exits with plus or converging vergence L’ in D. Is valid only if the units of measurements used for l= Object distance and l’ = Image distance is meters (m), rather than centimeters (cm) that she prefers. The Lensmakers Equation used in this video… The Lensmakers Equation as written in this Ontario Georgian College video production uses measurement units in meters (m), rather than centimeters (cm) that this instructor prefers. A video tutorial on the lens makers equation:
