Post by account_disabled on Jan 11, 2024 6:18:47 GMT -5
Excitation allows us to deposit heat in biological tissue, or even make molecules more reactive, altering natural metabolism, or we can even collect the light re-emitted by biological tissue and use it as a print digital scan of the biomolecules present there, a fact that can diagnose a disease, such as cancer or another. (bagnato and pratavieira, 2015, p. 4206). Optics is also present in several instruments used in several other areas, such as in astronomy through telescopes (borges, 2022), in photography with lenses, in agronomy with the refractometer, in medicine with lasers, etc. Understanding optics is therefore essential in the construction of various instruments frequently used by society. Due to this importance provided by optics to society, it is one of the topics covered in the physics subject in high school, and according to ausubel (2003) and guimarães (2009) experimentation is essential to achieve meaningful learning.
Experimentation means that students do not just remain in the field of theory, inserting them into the world of practice (bispo, 2020) and (martins, 2022). However, there is a shortage of financial resources for experimental classes in science education in general, both at elementary and secondary levels. But would it be possible to construct didactic experiments in the field of optics using low-cost materials? In this sense, the main objective of this article is the development America cell phone number list Of optical instruments for experimentation with didactic purposes and built with low-cost materials. The materials used in the construction of these instruments can be easily purchased at stationery stores, hardware stores, mirror factories, or recycled materials points. The methodology applied is the laboratory and instrumentation techniques used in physics. In the next sections we present the construction procedures for these instruments from low-cost materials and their applications using the physical concepts of geometric optics taught in high school.
Instrument 1: kaleidoscope goal build a device based on the association of flat mirrors observing the formation of images. Materials used three mirrors (6 cm 18 cm); transparent plastic (10 cm 10 cm); cardboard; glue; colorful objects; elastic garter; scissors. These materials can be purchased at stationery stores, hardware stores, or at recycling collection points. Mirrors can also be purchased from mirror factories that discard smaller cut-out parts that will not be used for sale by the factory. Construction procedures a) place the three mirrors to form a triangular prism so that the mirrored surfaces face the inside, figure 1. Figure 1 – schematic of a prism. Schematic of a prism. Source: the authors. B) using an elastic band, tie the formed prism, figure 2. Wrap the ends and center with transparent tape (durex). After that, remove the elastic garter. The assembled model will be as shown in figure 3. Figure 2 – prism secured with an elastic band. Prism secured with elastic garter source: the authors.
