Resumen: El clásico experimento de las franjas interferenciales de Young empleando un biprisma de Fresnel para obtener la doble rendija suele realizarse con fuentes casi monocromáticas: una lámpara espectral de sodio, un láser, etc. Incluso la explicación teórica suele asumir que la fuente es monocromática. Esto impide observar algunos aspectos del experimento, como que la interfranja aumenta con la longitud de onda. Además, origina un efecto negativo mucho más grave, ya que induce a algunos estudiantes a concluir de forma errónea que las interferencias sólo se producen cuando se emplean fuentes monocromáticas . En este artículo se muestra una sencilla modificación del experimento empleando luz blanca y filtros RGB, la cual permite observar claramente interferencias con luz policromática y verificar que la interfranja aumenta con la longitud de onda.
The well known experiment of Young about interferences by means of a Fresnel biprism to obtain the double slit is usually made using quasi monochromatic sources: a sodium spectral lamp, a laser, etc. Besides , a monochromatic source is also assumed in order to develop the theoretical explanation of the experiment. Then, some experimental details are lost, as the dependence of the fringe to fringe spacing on the wavelength. Moreover, a much more dangerous negative effect is originated, since some students come to the following false conclusion: interference phenomena only are originated by monochromatic sources. In this paper, an easy modification of this experiment is shown. Thus, by employing a white source and RGB filters, it is possible to observe interference fringes with polychromatic light and verify that its period raises with the wavelength.
Idioma: Español
DOI: 10.7149/OPA.48.3.243
Año: 2015
Publicado en: OPTICA PURA Y APLICADA 48, 3 (2015), 243-247
ISSN: 0030-3917
Factor impacto SCIMAGO: 0.154 - Engineering (miscellaneous) (Q3) - Mechanical Engineering (Q4) - Atomic and Molecular Physics, and Optics (Q4) - Electronic, Optical and Magnetic Materials (Q4)
Tipo y forma: Article (Published version)
Área (Departamento): Área Óptica (Dpto. Física Aplicada)
Exportado de SIDERAL (2021-01-21-11:06:48)
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The well known experiment of Young about interferences by means of a Fresnel biprism to obtain the double slit is usually made using quasi monochromatic sources: a sodium spectral lamp, a laser, etc. Besides , a monochromatic source is also assumed in order to develop the theoretical explanation of the experiment. Then, some experimental details are lost, as the dependence of the fringe to fringe spacing on the wavelength. Moreover, a much more dangerous negative effect is originated, since some students come to the following false conclusion: interference phenomena only are originated by monochromatic sources. In this paper, an easy modification of this experiment is shown. Thus, by employing a white source and RGB filters, it is possible to observe interference fringes with polychromatic light and verify that its period raises with the wavelength.
Idioma: Español
DOI: 10.7149/OPA.48.3.243
Año: 2015
Publicado en: OPTICA PURA Y APLICADA 48, 3 (2015), 243-247
ISSN: 0030-3917
Factor impacto SCIMAGO: 0.154 - Engineering (miscellaneous) (Q3) - Mechanical Engineering (Q4) - Atomic and Molecular Physics, and Optics (Q4) - Electronic, Optical and Magnetic Materials (Q4)
Tipo y forma: Article (Published version)
Área (Departamento): Área Óptica (Dpto. Física Aplicada)
Exportado de SIDERAL (2021-01-21-11:06:48)
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Visitas y descargas
Este artículo se encuentra en las siguientes colecciones:
articulos > articulos-por-area > optica
Notice créée le 2018-09-11, modifiée le 2021-01-21