Some things shine at night because they remember the sunlight. When you get a glow-in-the-dark sticker, it stays bright for hours after you turn off the lights, that’s how luminescent materials work! Just like those stickers, some rocks or moon rocks can store light from the sun and slowly give it back at night.
Examples
- A glow-in-the-dark sticker stays bright after you turn off the lights
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See also
- What Makes a ‘Laser’ Different from a Regular Light?
- Why Can't We See the Moon During the Day?
- What causes light to scatter away?
- What is bright?
- What are specular reflections?