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Copyright of E-Gnosis is the property of Universidad de Guadalajara, Coordinacion General Academica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of this work was to clarify the difference between two color phenomena: the shadow color, which adds color to the shadows, and the colored shadows, which appears due to the context effect on the color perception. A laboratory photograph is introduced to illustrate the colored shadow effect and how this perceptual effect cannot be explained using classical colorimetry. A yellow colored shadow is observed when two separate white and blue lights illuminate a blank screen and an obstacle occludes part of the light impinging on the screen, and the Retinex Theory is used to explain that phenomenon. [ABSTRACT FROM AUTHOR]

Se presenta una propuesta didáctica en la que se estudia la relación entre la percepción visual, la fotografía y la interacción de la luz con objetos. Se describe el fundamento teórico que incluye el estudio de la óptica y la psicofísica de la visión, se indican los materiales empleados y se comenta sobre los resultados y comentarios de alumnos que participaron de la experiencia.

Copyright of E-Gnosis is the property of Universidad de Guadalajara, Coordinacion General Academica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of E-Gnosis is the property of Universidad de Guadalajara, Coordinacion General Academica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of E-Gnosis is the property of Universidad de Guadalajara, Coordinacion General Academica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of E-Gnosis is the property of Universidad de Guadalajara, Coordinacion General Academica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)