Da física clássica à moderna: o simples toque de uma sirene

This article presents the construction of a experiment with a lower possible cost to demonstrate essentials concepts of quantization of energy, corpuscular model of the light and the conduct of electricity in solid for the students of the third year in the high school, significantly helping in explaining topics of modern physics. The proposal is that the work will not only contribute to the explanation of such content, but may arouse the interest to the scientific research and understand how the modern physics is present in daily. The model constructed is only a proposal for explaining the contents addressed in high school, since it could be used by teachers in classes in introductory undergraduate courses. The model follows other stages of improvement for lines of search more investigative to the students graduate in physics.