Diffraction Gratings | Physics II (General College Physics) - Diffraction Gratings

This lecture extends the ideas of two-slit interference to systems with many slits, known as diffraction gratings. We explore how increasing the number of slits sharpens interference patterns and dramatically improves wavelength resolution. The concept of diffraction order is introduced, along with the angular separation of different wavelengths. Diffraction gratings are shown to be powerful tools for spectroscopy, allowing light to be separated into its component colors. Both transmission and reflective gratings are discussed, along with their practical use in optical instruments. Resources • Course Home Page: https://www.darinulness.com/teaching/general-physics • Full Course Notes (PDF): https://drive.google.com/file/d/1oXPWnNuS1FS77uTsZlfgPiKZBKGtKhIa/view • Playlist: https://www.youtube.com/playlist?list=PLMmzicajje3x4janDJf52x1AWmtRcDzK2 Suggested Textbook Knight, R.D., Jones, B., & Field, S. College Physics: A Strategic Approach (4th Edition). Pearson, 2019. Any non-calculus-based college physics textbook provides a helpful supplement.