Glow in the dark is like a special kind of night light that lives inside some materials. When you shine a light on them, they absorb it like a sponge and hold onto it for a while. Then, when the lights go out, they slowly let the light come back out, just not as bright as before. It's like having a sleepy friend who takes time to wake up after you turn off the lamp.
Examples
- A glow-in-the-dark sticker shines softly after you turn off the lights.
- A cat toy glows on the floor even when no one is in the room.
- Your favorite shirt glows faintly under your bed at night.
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See also
- What are light waves?
- Why Do Some Metals Sparkle When They're Rubbed?
- What is sunlight?
- What is Light and heat?
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