Some metals look extra shiny when you rub them because tiny bits of light bounce off their smooth, polished surface. Imagine a mirror, the smoother it is, the clearer your reflection. When you rub the metal, it gets even smoother, and more light bounces back, making it sparkle like a disco ball.
Examples
- Rubbing a clean copper spoon on a table makes it shine more than before.
- A silver ring starts to look like a mirror after you polish it with a cloth.
- When you drag your finger across a polished metal plate, it reflects the light in a dazzling way.
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See also
- Why Does Time Seem to Fly When You're Having Fun?
- What Causes the Sky to Change Colors at Sunset?
- What Causes the Northern Lights?
- What Causes a ‘Golden’ Sunset or Sunrise?
- How Does a Mirror Work Exactly?
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Categories: Physics · metals,friction,light reflection,surface properties