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To understand the line emission spectra of an atom, we must study the emission of a photon and the energy level diagram of the atom. We will also see how to calculate the wavelengths of the emitted photons. 00:00 - line emission spectra 00:35 - energy level diagram 01:30 - emission of a photon All videos on this topic are grouped in this playlist: • ???? 1st specialization - Light: waves and parti... 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