https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/standing-waves/v/beat-frequency 2022-11-16T04:22:43.7414897Z Beat frequency Beat frequency occurs when two waves with different frequencies overlap, causing a cycle of alternating constructive and destructive interference between waves. Learn how this results in a fluctuation in sound loudness, and how the beat frequency can be calculated by finding the difference between the two original frequencies. David SantoPietro video https://cdn.kastatic.org/googleusercontent/DinMTrBRLi0yKtdu3UGrznoI9CRroVwUX8vRz9z2T_IpFKLJEKb5XQIFhmJQ8QX-u-eCMc_r1n1soy_h6jRvxuqx Beat frequency Beat frequency occurs when two waves with different frequencies overlap, causing a cycle of alternating constructive and destructive interference between waves. Learn how this results in a fluctuation in sound loudness, and how the beat frequency can be calculated by finding the difference between the two original frequencies. https://cdn.kastatic.org/ka-youtube-converted/Ca91iOVGd9A.mp4/Ca91iOVGd9A.mp4 708 Beats in sound and applications of polaroids https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:waves-sound-and-physical-optics/x0e2f5a2c:sound/e/beats-ap-physics-1 2026-04-08T00:54:09.631945657Z Analyzing the interference of sound waves and beats Practice analyzing patterns formed when two sound waves interfere.  Sean exercise https://www.khanacademy.org/science/in-in-class11th-physics/in-in-11th-physics-waves/beats-and-interference-of-sound-waves/a/beats-and-interference-of-sound-waves-review-ap 2021-04-29T08:02:16Z Beats and interference of sound waves review Review of how to produce beats through the constructive and destructive interference of sound waves. article https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/standing-waves/v/derivation-of-beat-frequency-formula 2021-02-07T17:14:01Z Derivation of beat frequency formula In this video David derives the formula for beat frequency. David SantoPietro video https://cdn.kastatic.org/googleusercontent/uqjBcMhbHxl84Y_eStxnr_7p-7_C97Mwyett3FCUGauV2L7niVZ6oW_EAWgYaLPtzyAv7zAu1RHUpwJogSCT0cUI Derivation of beat frequency formula In this video David derives the formula for beat frequency. https://cdn.kastatic.org/ka-youtube-converted/pI6iJg_W1ug.mp4/pI6iJg_W1ug.mp4 595 Beats in sound and applications of polaroids https://www.khanacademy.org/science/optics-essentials/x0484cce4552ac2a3:why-do-bubbles-appear-colorful/x0484cce4552ac2a3:why-does-light-bend-around-corners/e/huygen-s-principle 2026-04-08T00:54:09.631945657Z Huygens' principle: wavefronts and secondary wavelets Let's practice some problems to better understand the nuances in Huygen's principle, that describes the interaction between wavefronts and surfaces. exercise https://www.khanacademy.org/science/optics-essentials/x0484cce4552ac2a3:why-do-bubbles-appear-colorful/x0484cce4552ac2a3:why-does-light-bend-around-corners/e/huygens-principle-wavefronts-through-different-media 2026-04-08T01:15:04.085520103Z Huygens' principle: wavefronts through different media Let's practice some problems to better understand how wavefronts change shapes while passing between media of different optical densities. exercise https://www.khanacademy.org/college-careers-more/bjc/2019-challenge/2019-challenge-finalists/v/gravitational-waves 2020-11-18T19:37:57Z Gravitational waves By Brooklyn Clark. Country: USA, Finalist: 2019 Breakthrough Junior Challenge video https://cdn.kastatic.org/googleusercontent/A-ZLlb8rkGs40vEl-qmYu14Iiib1lG74QjKostVLY-VYZc1WPAhwpiHsrLoocfk8Wh9w762ZR5WxaaTRXNSTBJlB Gravitational waves By Brooklyn Clark. Country: USA, Finalist: 2019 Breakthrough Junior Challenge https://cdn.kastatic.org/ka-youtube-converted/Ls4PiOtI5mo.mp4/Ls4PiOtI5mo.mp4 176 Beats in sound and applications of polaroids