  ESPANOL: Una experiencia que parte del uso de un espejo plano colocado
horizontalmente a la altura de la nariz del observador, que permite uma nueva
dimension a la experiencia de ver imagenes com espejos simples, sirve para
discutir lo que aun puede hacerse para que el estudiante gane uma vision mas
profunda y conceptual en el aprendizaje de la fisica. El enfasis esta en la
idea de independencia mental, que incluye la de que nuevos resultados pueden
surgir en el analisis de experimentos que no necesariamente precisan ser hechos
con elementos nuevos o de sofisticada realizacion.
  ENGLISH TRANSLATION: The experience of employing a plane mirror located at
the height of the nose of an observer, giving a new dimension to the
experiences made with simple mirrors, is used as an example into the discussion
of what can be done for the student to reach a deeper and conceptual insight in
learning Physics. The main idea lays on the mental independence, which includes
that new results can come through the analysis of experiments which not
necessarily needs to be made with new elements or through a sophisticated
procedure.
