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Original Price $6.95 Comp. value
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Cherenkov Radiation Keychain
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Aluminum Circle
+$1.75
+$1.75
+$18.30
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Cherenkov Radiation Keychain
Features a blue-toned, fractal representation of Cherenkov radiation in water. Customize by adding your own text on the reverse side.
The blue glow in the water surrounding nuclear reactors is Cherenkov radiation. When a charged particle does move through a medium at a speed higher than the speed of light in that medium, a faint radiation is produced by the medium. In water charged particles excite water molecules, which then return to their normal state by emitting photons of blue light. Because the particle is moving faster than the speed of light in water, it can trigger a cascade of photons that are in phase with each other and can interfere constructively to form a visible blue glow. This is somewhat analogous to a sonic boom in the atmosphere. This effect was observed by Russian scientist Pavel Cherenkov in 1934 when he was asked to look at the effects of radioactivity in liquids. Cherenkov won a Nobel prize in 1958.
Customer Reviews
4.6 out of 5 stars rating5.4K Total Reviews
5,379 Reviews
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5 out of 5 stars rating
By linda f.June 18, 2025 • Verified Purchase
Premium Round, Small (1.44")
So cute and this is perfect!!!
5 out of 5 stars rating
By Zali O.August 9, 2023 • Verified Purchase
Aluminum Circle, 2"
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These are so cute and beautiful made. Printing is good clear
5 out of 5 stars rating
By V.August 21, 2023 • Verified Purchase
Zazzle Reviewer Program
Beyond expectations. Choice of artwork is overwhelming, I found exactly what I needed from SJW_Graphics. Detail, colors, overall design looks great on this keyring. Could use as a pendant, purse charm, bookmark, too! Metal is sturdy without being heavy. Colors beautiful, with clear margins. Customized name makes this gift extra special. So many fonts, so many colors & sizes!
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Product ID: 256045759745890806
Created on: 10/19/2025, 3:54 AM
Rating: G
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