Maja turns on the TV and wonders how a fish can swim across the screen—and where its splash comes from. This song explores how a signal guides pixels and speakers, how changing still pictures appear to move, and how a vibrating speaker moves the air to make sound.
Original explanations based on the cited sources.
Sound is a travelling vibration in a material, such as air, water or metal. It needs a medium, so it does not travel through a vacuum.
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A pixel is one element in the grid of a digital image and stores colour information. Many pixels together form a photo or video frame.
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RGB describes a colour using red, green and blue light components. Screens combine these components to display many different colours.
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Additive mixing combines light of different colours. A suitable combination of red, green and blue light produces white; mixing paint works differently.
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A video displays successive still images called frames. Showing them rapidly in the right order lets us perceive motion.
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Decoding reads data stored according to a particular code. During video playback, a decoder turns encoded data into images or sound that can be played.
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Text from the recording’s subtitles.
3:08What makes those bright August streaks? This energetic space song shows how tiny grains from Comet Swift–Tuttle enter our atmosphere and create the Perseids. It also shares easy, safe viewing tips—no telescope needed.
3:02How does a smoke detector notice smoke? This upbeat science song explores a common optical detector: smoke enters its chamber, particles scatter LED light toward a receiver, and the electronics sound a warning. An alarm warns people but does not put out a fire. An adult should test it with the button as directed.
2:17What happens after the kettle switch clicks? This catchy educational song shows how a closed circuit powers an insulated heater, heat circulates through the water, and a thermostat cuts the current when boiling begins. It also explains why the white mist is made of tiny droplets—and why a hot kettle is for an adult to handle.
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