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To understand the line absorption spectra of an atom, we must study the absorption of a photon and the energy level diagram of the atom. We will also see how to calculate the wavelengths of the absorbed photons. 00:00 - absorption spectra of lines 01:14 - absorption of a photon All videos on this topic are grouped in this playlist: • 🔷 1st specialization - Light: waves and parti... Video explaining energy diagrams - Emission of a photon • Emission of a photon - Quantification... High school program - 1st specialty physics chemistry: 📝Theme: Waves and signals Sub-theme: 2. Light: images and colors, wave and particle models ✔️ Cite the order of magnitude of the frequencies or wavelengths of electromagnetic waves used in various fields of application (medical imaging, visible optics, wifi signals, microwaves, etc.). ✔️ Use the expression giving the energy of a photon. Find other videos and methodological sheets to download for free: https://eprofs.fr Twitter: / e_profs Instagram: / e_profs_physique_chimie Facebook: / e-profs-467482426970398