A PROPOSAL FOR TEACHING MODERN PHYSICS:
EXPERIMENTAL DETERMINATION OF THE SPEED OF LIGHT USING THE ARDUINO
One of the teaching methodologies that is most pleasing to students is the use of technological media in the classroom. Among those that can be used in the high school curriculum are ludic experiences with cell phones and some simple programming languages such as the electronic prototyping platform, Arduino Uno. In this way, we can develop the study of various aspects of sciences such as Mathematics, Physics, and Chemistry among others using the cell phone and the Arduino platform, making them great allies for learning, facilitating the assimilation of content in the classroom.
This study proposes to involve students in the complex work of research and conclusion of a theory. We intend to demonstrate to the students that laws and theories do not come from guesswork or luck. Everything is the result of a lot of effort and the sum of small advances made by various scientists over time. Our intention is to highlight that Physics is much more than a compendium of formulas and exercises, without a greater purpose. This study approaches a journey through time, bringing to the classroom the history of the development of scientific thought in the last decades of the 19th century and early 20th century. In order to do so, we will conduct three experiments with the aim of discussing the importance of determining the speed of light for the revolution of Physics, which marks the emergence of the so-called "Modern Physics". Modern Physics is established based on two major theories: Special or Restricted Relativity, proposed in 1905 by Albert Einstein, and Quantum Physics. Therefore, we will develop this work aiming for the ludic aspect of a class, where students will have the opportunity to perform three experiments to try to determine the value of the speed of light. In the first one, we will simulate the experiment conducted by Galileo Galilei in the early 17th century. In the second experiment, we will recreate the attempt made by Fizeau in 1849, where the French physicist used a device with a toothed wheel. And in the third one, we will reproduce the famous "Michelson-Morley Experiment". To conclude the activities, we will use a device consisting of a laser and a light emitter/receiver, along with an Arduino platform and an Excel spreadsheet, to obtain more precise measurements of the speed of light. The study of Physics will take place in an enabling environment, with individual and group activities, and the use of cell phones/Arduino in the classrooms, so that learning can occur effectively and enjoyably.