Espectro Eletromagnético: Ondas, Frequência e Ionização

Section role: supports the 'Sistematizando o Espectro Eletromagnético' section while the teacher formalizes concepts, connecting the students' group findings from Section 2 to academic definitions. Slides: (1) Title — 'O Espectro Eletromagnético'; (2) Revisiting Section 2 — bullets: reviewing the cases of the X-ray apron, sunscreen, router, and microwave; (3) Definition of Radiação — energy propagation through waves or particles; (4) Electromagnetic Spectrum overview — visual scale showing wavelength compared to everyday objects like buildings, humans, and atoms; (5) Ionizing Radiation — bullets: high frequency, gamma rays and X-rays, capability of stripping electrons, dose importance; (6) Non-Ionizing Radiation — bullets: low frequency, radio waves and visible light, thermal effects without atomic ionization; (7) Frequency vs Wavelength inverse relationship; (8) Myth vs Fact — addressing the misconception that all radiation causes cancer; (9) Closing slide — 'Se toda radiação invisível fosse ionizante, poderíamos usar Wi-Fi e rádio sem restrições? Justifique com base na frequência.' — hands control back to the teacher to transition into the application activities in Section 4.