The Casimir Effect Explained
Can nothing push two plates together?
Your turn!
Question 1 of 2Why do two very close plates get pushed together?
The story
Quarky holds two shiny plates super close in totally empty space, and something invisible squeezes them together. Empty space is never truly empty: it fizzes with tiny waves. Between the plates only a few waves fit, so the crowd of waves outside pushes harder and the plates hug.
What you'll learn
- Empty space fizzes with tiny quantum fluctuations
- Only certain waves fit in a very narrow gap
- More waves outside than inside means a real push inward
- The Casimir force is measurable and matters for tiny machines
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