Theorists · Ages 16–18· λ = 470 nm

Oscillations and Waves

Watch a spring draw its own sine wave, solve the mystery of the pendulum wave on the home page, send waves down a rope until they stand still, and make two sources of ripples cancel each other out.

3 lessons 37 min 185 XP

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Lessons

1〰️Simple harmonic motionA force that pulls back in proportion to how far you stray produces a perfect sine wave.13 min65 XP
2🌊Waves and standing wavesA wave carries energy without carrying matter. Trap it between two ends and it stands still.12 min60 XP
3💧Interference and the Doppler effectTwo waves can add up or cancel out, and a moving source squeezes its waves in front.12 min60 XP