Lifelong Learning Programme

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Title of the Experience
Waves and coins can disappear. Science or magic?
Name of the teacher
M. Reyes LLácer Pérez
Country where it took place
School typology
High Secondary School
Thematic Area
Biology, Science
Experience typology
Teaching in class
Type of contact
Description of the Experience
When an earthquake occurs, and we study the seismic waves, we can see appear shadow areas on the planet where neither P nor S waves are received Although there are multiple animations and drawings that explain this phenomenon, it is sometimes difficult to convince students of this fact. So, based on the phenomenon of refraction, we can do a practice that allows students to experience the phenomenon for themselves.
The practice is based on the phenomenon of refraction of light waves as they pass through different substances. To start the practice it is necessary to put the students in a circle arount a table. A coin and a crystallizer are needed. Under the crystallizer a coin is placed and all students can see it. The crystallizer is slowly filled with water and there comes a time when the currency is not seen because the light beam has been deflected by the glass, water and air, not being able to reach the eye of the student. At that time students come near the table and if they look at the crystallizer perpendicular (from the top) they can clearly see the currency, which had previously disappeared from their view.
From this experience students better understand the phenomenon of refraction and understand that when an earthquake occurs there are shaded areas for seismic waves on the planet.

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Dissemination Seminar in Florence

31 October 2015 The seminar has been held in ITIS “A. Meucci” one of the schools involved within Goerudio project activities. Its main aim was to promote the results of the project toward a broad sample of stakeholders even overcrossing the number of people directly involved in the production of project outcomes. This purpose has been totally achieved especially thanks to the participation of students and teachers coming from different schools or from other classes instead of those ones directly involved within the project activities.