| SIMULADO FUVEST 2026 | Q52 - O FENÔMENO DA DIFRAÇÃO CONSTITUI UMA IMPORTANTE CARACTERÍSTICA DO

I am Felipe Filatte, a teacher and pedagogical coordinator, specializing in ENEM and university entrance exams. Here you will find commented solutions, focused on understanding the reasoning and gaining confidence in the exam. 🎁 FREE GIFT FOR THOSE PREPARING FOR THE ENEM (Brazilian National High School Exam) ENEM TRI Calculator Spreadsheet https://docs.google.com/spreadsheets/... 📂 LINK TO THE DRIVE WITH PREVIOUS FUVEST EXAMS https://drive.google.com/drive/folder... STATEMENT The phenomenon of diffraction is an important characteristic of the wave behavior of light. In this phenomenon, waves deviate from their initial direction of propagation when they encounter obstacles or pass through openings with apertures on the order of their wavelength. Diffraction is convenient for estimating distances considered "small," in relation to which traditional measuring instruments become inaccurate. Available at https://commons.wikimedia.org/. The figure shows the light intensity pattern produced by the incidence of light on a hair strand, exhibiting an alternation of maxima and minima of intensity. In the case of detection far from the slit, the thickness L of the hair strand can be calculated from the width of the central maximum intensity, given by y = 2λD/L, where λ and D are the wavelength of the incident light and the distance between the hair strand and the screen, respectively. Consider that light is incident on a hair strand, approximately 50 μm thick, and that the image is projected onto a screen at a distance of 1 m. Which of the following wavelengths would allow for better relative precision in measuring the thickness of a hair using a 1 mm precision ruler? A) 200 nm B) 300 nm C) 400 nm D) 500 nm E) 600 nm Note and adopt: Relative precision is defined as the ratio between the intrinsic error of the measurement and the value of the measurement itself. Answer: ✅ Alternative E #fuvest #fuvest2026 #simuladofuvest #questoescomentadas #fisica #ondulatoria #difracao #luz #comprimentodeonda #interferencia #vestibulares #medicina #professorfilatte #enem #tri