000129871 001__ 129871
000129871 005__ 20240112163659.0
000129871 0247_ $$2doi$$a10.1088/1361-6552/ac7cb1
000129871 0248_ $$2sideral$$a129781
000129871 037__ $$aART-2022-129781
000129871 041__ $$aeng
000129871 100__ $$0(orcid)0000-0003-3178-5253$$aTorcal Milla, Francisco José$$uUniversidad de Zaragoza
000129871 245__ $$aA diffraction experiment at the near field: the homemade Talbot effect
000129871 260__ $$c2022
000129871 5060_ $$aAccess copy available to the general public$$fUnrestricted
000129871 5203_ $$aDiffraction refers to a kind of optical phenomena which occurs when light approaches an element (object or aperture) whose features are in the range of the illuminating wavelength (small apertures, sharp edges). It can be explained by means of the undulatory nature of light or also geometrically by using simple ray optics. Diffraction phenomena are impressive and not intuitive, so it makes them very interesting to bring examples to the classroom. The most popular diffraction experiments show effects in Fraunhofer regime, that is to be said, far from the diffractive object. Common examples are the single or double slit experiments. In this manuscript, we propose and show a less common diffractive effect that occurs in the Fresnel regime, near to the diffractive object. It is the Talbot effect or self-imaging phenomenon, which appears by illuminating a diffraction grating with a collimated monochromatic beam. It consists of the apparition of replicas (self-images) of the grating intensity pattern at periodic distances, multiples of the so-called Talbot distance. We show how this effect may be shown into the classroom with cheap and easy to find elements. In addition, we take advantage of its dependence on the coherence degree of the source to introduce the concept of optical coherence and show its effect on the contrast of the Talbot self-images. These experiments could be appropriate for undergraduate students or introductory physics courses.
000129871 536__ $$9info:eu-repo/grantAgreement/ES/DGA-FEDER/E44-20R$$9info:eu-repo/grantAgreement/ES/MICINN/PID2020-113303GB-C22$$9info:eu-repo/grantAgreement/ES/UZ/JIUZ-2020-CIE-06
000129871 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000129871 592__ $$a0.402$$b2022
000129871 593__ $$aPhysics and Astronomy (miscellaneous)$$c2022$$dQ2
000129871 593__ $$aEducation$$c2022$$dQ2
000129871 594__ $$a1.3$$b2022
000129871 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000129871 7102_ $$12002$$2385$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Física Aplicada
000129871 773__ $$g57, 5 (2022), 055020 [7 pp.]$$tPhysics Education$$x0031-9120
000129871 8564_ $$s624009$$uhttps://zaguan.unizar.es/record/129871/files/texto_completo.pdf$$yPostprint
000129871 8564_ $$s1953923$$uhttps://zaguan.unizar.es/record/129871/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000129871 909CO $$ooai:zaguan.unizar.es:129871$$particulos$$pdriver
000129871 951__ $$a2024-01-12-14:10:32
000129871 980__ $$aARTICLE