https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:electromagnetic-radiation/x6679aa2c65c01e53:wave-behaviors-of-em-radiation/v/electromagnetic_waves 2024-05-16T01:13:56.718395588Z Electromagnetic waves Electromagnetic (EM) waves are produced whenever electrons or other charged particles accelerate. The wavelength of an EM wave is the distance between consecutive points on the wave with the same phase (e.g. one crest to the next crest). The frequency of an EM wave is how many wave cycles are emitted, or pass a given point, per second. The speed of a wave is equal to its frequency times its wavelength. In vacuum, all EM waves travel at speed c = 3 x 10^8 m/s. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/fa27a4a6-9f11-4533-8d14-5569e37dfdff_1280_720_base.png Electromagnetic waves Electromagnetic (EM) waves are produced whenever electrons or other charged particles accelerate. The wavelength of an EM wave is the distance between consecutive points on the wave with the same phase (e.g. one crest to the next crest). The frequency of an EM wave is how many wave cycles are emitted, or pass a given point, per second. The speed of a wave is equal to its frequency times its wavelength. In vacuum, all EM waves travel at speed c = 3 x 10^8 m/s. https://cdn.kastatic.org/ka-youtube-converted/Je_f4RimfKI.mp4/Je_f4RimfKI.mp4 853 The particle nature of light and the photoelectric effect https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:electromagnetic-radiation/x6679aa2c65c01e53:wave-behaviors-of-em-radiation/e/apply-electromagnetic-waves 2026-03-26T05:30:45.387289448Z Apply: electromagnetic waves Apply your knowledge of electromagnetic waves in this set of free practice questions. Emily exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:modern-physics/x0e2f5a2c:wave-particle-duality/v/photon-energy 2024-07-15T03:10:22.417106256Z Photon energy Learn what a photon is and how to determine the energy of a photon as you explore the dual nature of light as both a wave and a particle, known as wave-particle duality. Uncover the concept of quantum mechanics, where light deposits energy in discrete amounts called photons. Investigate Planck's constant and how it relates to the energy of a photon. David SantoPietro video https://cdn.kastatic.org/googleusercontent/2aFknxFb-tlzge2Pv8ciTriLr98lwfI0zdhECAbuyJKKsuwK4Qlxrfc7yvfNo3uTaNhbct4BFNQBx5LKR9kOyxHt Photon energy Learn what a photon is and how to determine the energy of a photon as you explore the dual nature of light as both a wave and a particle, known as wave-particle duality. Uncover the concept of quantum mechanics, where light deposits energy in discrete amounts called photons. Investigate Planck's constant and how it relates to the energy of a photon. https://cdn.kastatic.org/ka-youtube-converted/Zqt3btS1FwE.mp4/Zqt3btS1FwE.mp4 558 The particle nature of light and the photoelectric effect https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:modern-physics/x0e2f5a2c:wave-particle-duality/v/photon-momentum 2024-07-15T03:10:22.417106256Z Photon momentum Learn how to determine the momentum of a photon. video https://cdn.kastatic.org/googleusercontent/QB6PvoZPj9a3NFJoTQx2Ja133wXPqIias3HYfzel6A5FeX1hTIyDhxSCAtVQPYfLn2ByJOd_Z3GW47r6jgXQ-wav Photon momentum Learn how to determine the momentum of a photon. https://cdn.kastatic.org/ka-youtube-converted/Qwtz-QSDyOM.mp4/Qwtz-QSDyOM.mp4 175 The particle nature of light and the photoelectric effect https://www.khanacademy.org/science/modern-physics-essentials/x1bb01bdec712d446:why-light-and-matter-are-two-faced/x1bb01bdec712d446:einstein-s-elegant-equation-to-decode-the-photoelectric-effect/v/photoelectric-effect 2021-07-13T07:08:36Z Photoelectric effect Explaining the photoelectric effect using wave-particle duality, the work function of a metal, and how to calculate the velocity of a photoelectron. Jay video https://cdn.kastatic.org/googleusercontent/gqySkF-QLR1DIapMNaJf4cKjCot4c_Q_bS3RJWhG51wNipkKEBiJhFs4JhcAYKEKpKnBDkaZxVc1anx-qYHe2W04 Photoelectric effect Explaining the photoelectric effect using wave-particle duality, the work function of a metal, and how to calculate the velocity of a photoelectron. https://cdn.kastatic.org/ka-youtube-converted/vuGpUFjLaYE.mp4/vuGpUFjLaYE.mp4 624 The particle nature of light and the photoelectric effect https://www.khanacademy.org/science/modern-physics-essentials/x1bb01bdec712d446:why-light-and-matter-are-two-faced/x1bb01bdec712d446:einstein-s-elegant-equation-to-decode-the-photoelectric-effect/a/photoelectric-effect 2025-02-05T10:28:14.374739025Z Photoelectric effect Explaining the experiments on the photoelectric effect. How these experiments led to the idea of light behaving as a particle of energy called a photon. article