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Light & sound

Color, waves, mirrors, music, rainbows, radio.

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Light & sound Storybook How does a song fly through the air into your radio? wavessound Open the story Light & sound Storybook Why is the sky blue? lightcolor Open the story Light & sound Storybook WiFi, Bluetooth, infrared — why does a TV remote need to point, but your phone doesn't? wavessignals Open the story Light & sound Storybook What does a microwave actually heat? waveswater Open the story Light & sound Storybook Can adding sound make a plane quieter? soundwaves Open the story Light & sound Storybook Why does a spoon look bent in water? lightrefraction Open the story Light & sound Experiment Why can't you see around a corner, but you can hear around one? soundwaves Try it out Light & sound Experiment Why do colored paints and colored lights mix differently? colorlight Try it out Light & sound Experiment Why can a singer shatter a glass with just the right note? soundresonance Try it out Light & sound Experiment Why does a rainbow always curve, and could you ever reach its end? lightcolor Try it out Light & sound Experiment Why does a pencil's shadow have a fuzzy edge sometimes and a sharp edge other times? lightshadows Try it out Light & sound Storybook Why does a police siren change its note as it races past you? soundwaves Open the story Light & sound Experiment Why do bendy glass threads carry far more of your video call across the world without it fading? lightfiber Try it out Light & sound Experiment Why is a laser pointer a tiny dot far away but a flashlight is just a blob? lightlasers Try it out Light & sound Experiment Why does a magnifying glass flip the world upside down when you back it away? lightlenses Try it out Light & sound Experiment What happens when two sound waves overlap? soundwaves Try it out Light & sound Experiment Why does a thin soap bubble swirl with rainbow colors when soapy water is clear? lightcolor Try it out Light & sound Experiment Why does plucking a tighter guitar string make a higher note? soundmusic Try it out Light & sound Experiment Why does a red apple turn black under a green light? colorlight Try it out Light & sound Experiment Why does a sound die out fast in a small room but echo forever in a cave? soundechoes Try it out Light & sound Experiment Why does the moon look huge near the horizon but tiny up high? lightperception Try it out Light & sound Experiment Why does shaking a rope fast make tiny ripples but shaking it slow makes big rolls? wavesphysics Try it out Light & sound Experiment Why does some thunder crack but other thunder rumbles? soundwaves Try it out Light & sound Experiment Why are clouds white? lightcolor Try it out