https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/mechanical-waves/v/introduction-to-waves 2024-06-20T21:38:16.009746376Z Introduction to waves Transverse and longitudinal waves are two types of mechanical waves, which involve the transfer of energy through a medium (e.g. water, air, a solid). Learn about transverse and longitudinal waves through the examples of a rope and a sound wave. Explore the difference between a single wave pulse and periodic waves. Sal Khan video https://cdn.kastatic.org/googleusercontent/tduQqKFS-v4-zx2ooHTRHNHoMslDaD_H6Rk6w8VuTV-q-9JjphysjBbxOHLbeqe5fqv29PsEarg41QuqEvVFTh1A Introduction to waves Transverse and longitudinal waves are two types of mechanical waves, which involve the transfer of energy through a medium (e.g. water, air, a solid). Learn about transverse and longitudinal waves through the examples of a rope and a sound wave. Explore the difference between a single wave pulse and periodic waves. https://cdn.kastatic.org/ka-youtube-converted/c38H6UKt3_I.mp4/c38H6UKt3_I.mp4 783 Waves https://www.khanacademy.org/science/6th-grade-science-matatag/x1c42f0f13f909d5b:3rd-quarter/x1c42f0f13f909d5b:waves/e/characteristics-of-longitudinal-and-transverse-wave 2026-04-08T00:54:09.631945657Z Characteristics of longitudinal and transverse wave Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:waves-sound-and-physical-optics/x0e2f5a2c:wave-properties/e/wave-characteristics-ap1 2026-05-12T22:10:47.015864082Z Properties of transverse and longitudinal waves Practice identifying the characteristics of a transverse or longitudinal wave such as the wavelength, crest, and areas of compression. April Russell exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:general-properties-of-waves/x0e04e0cb682fb793:transverse-and-longitudinal-waves/a/transverse-and-longitudinal-waves-ap1 2021-04-29T08:03:12Z Transverse and longitudinal waves review Overview of key terms and skills for waves, including how to identify longitudinal and transverse waves. article https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:waves-sound-and-physical-optics/x0e2f5a2c:wave-properties/e/transverse-and-longitudinal-wave-exercises-ap1 2026-04-07T23:55:07.30621384Z Identifying transverse and longitudinal waves Practice identifying representations of transverse and longitudinal waves April Russell exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:sound-waves/x0e04e0cb682fb793:production-of-sound-waves/a/sound-is-a-longitudinal-wave 2021-05-25T21:59:57Z Sound is a longitudinal wave article https://www.khanacademy.org/science/in-in-class11th-physics/in-in-11th-physics-waves/in-in-doppler-effect/v/introduction-to-the-doppler-effect 2023-09-10T17:11:17.624018169Z Doppler effect introduction Learn about the Doppler effect and how it explains the change in frequency of a wave when its source and an observer are moving. Understand how moving sound sources can alter the frequency and pitch we hear. Sal Khan video https://cdn.kastatic.org/googleusercontent/0lqkifyW0cQjFaEfjHz_qkIJuTyqq_wPd5EMnhy9TewOShlmnjfhomFel9iVGT0717MjzzOdXkKyOwFWdPOg6xM Doppler effect introduction Learn about the Doppler effect and how it explains the change in frequency of a wave when its source and an observer are moving. Understand how moving sound sources can alter the frequency and pitch we hear. https://cdn.kastatic.org/ka-youtube-converted/dc7l7Qqa8xk.mp4/dc7l7Qqa8xk.mp4 636 Waves https://www.khanacademy.org/science/in-in-class11th-physics/in-in-11th-physics-waves/in-in-doppler-effect/v/when-the-source-and-the-wave-move-at-the-same-velocity 2023-09-10T17:11:17.624018169Z When the source and the wave move at the same velocity What happens when both the listener and the source are moving together? In this exploration, you'll uncover what happens when the velocity of a wave source matches the wave's speed. You'll delve into the effects on observed frequency and period, leading to a deeper understanding of phenomena like sonic booms. Remember, this discussion applies to any wave, not just sound. Sal Khan video https://cdn.kastatic.org/googleusercontent/fVmdagf7kRH-Q-MaRklcJ1d9JhLDmcQcZk_uDRGvkFY-JTx8iVUqNDjbk6K9hwYTRlfzTtS-zwJ6rKJci9sOtUM When the source and the wave move at the same velocity What happens when both the listener and the source are moving together? In this exploration, you'll uncover what happens when the velocity of a wave source matches the wave's speed. You'll delve into the effects on observed frequency and period, leading to a deeper understanding of phenomena like sonic booms. Remember, this discussion applies to any wave, not just sound. https://cdn.kastatic.org/ka-youtube-converted/4Xgk3vusxT8.mp4/4Xgk3vusxT8.mp4 455 Waves https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/doppler-effect/v/doppler-effect-for-a-moving-observer 2023-09-10T17:11:17.624018169Z Doppler effect for a moving observer What happens when just the observer is moving? Explore the Doppler effect in sound waves as we examine how the frequency changes when an observer moves towards or away from a sound source. Understand the formulas used to calculate observed frequency, and how speed influences the pitch of the sound. David SantoPietro video https://cdn.kastatic.org/googleusercontent/keP83jiV3hOW5p5wXA-Q8Mxl4u1JnqMdk4_KjzgnM0pnHot1d82hrcly2i0TUuajF_x9Wzka5cYbpfkQg3z2brDDzA Doppler effect for a moving observer What happens when just the observer is moving? Explore the Doppler effect in sound waves as we examine how the frequency changes when an observer moves towards or away from a sound source. Understand the formulas used to calculate observed frequency, and how speed influences the pitch of the sound. https://cdn.kastatic.org/ka-youtube-converted/2TTu0TvB6N0.mp4/2TTu0TvB6N0.mp4 316 Waves https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/doppler-effect/v/doppler-effect-reflection-off-a-moving-object 2023-09-10T17:11:17.624018169Z Doppler effect: reflection off a moving object Does the doppler effect still apply when sound is being reflected off a moving object? Explore the Doppler Effect with two shifts in frequency. Understand how sound waves reflect off moving objects and change frequency, using the Doppler Effect formula. This knowledge is crucial in medical imaging and radar speed detection. David SantoPietro video https://cdn.kastatic.org/googleusercontent/GcokmAzh9erChpCYFPqDLt8CpVXCaW6BoPcTVaOXFmNHghNmtLqI99tX-WCdlT7cNL1eDmi2s95CYFXDwaAx8ho Doppler effect: reflection off a moving object Does the doppler effect still apply when sound is being reflected off a moving object? Explore the Doppler Effect with two shifts in frequency. Understand how sound waves reflect off moving objects and change frequency, using the Doppler Effect formula. This knowledge is crucial in medical imaging and radar speed detection. https://cdn.kastatic.org/ka-youtube-converted/i4ZiV6NIs98.mp4/i4ZiV6NIs98.mp4 469 Waves https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:waves-sound-and-physical-optics/x0e2f5a2c:sound/e/doppler-effect-ap1 2026-05-12T22:10:47.015864082Z Doppler effect Predict how different observers hear different frequencies from a word problem or wavefront diagram. April Russell exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:waves-sound-and-physical-optics/x0e2f5a2c:sound/a/doppler-effect-ap1 2026-06-01T10:10:43.143771843Z Learn and try: Doppler effect Learn about the Doppler effect. article