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Your Phil of cool physics for the day - CERisE's Testing for L

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May 30th, 2004

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06:54 pm - Your Phil of cool physics for the day
Cerenkov Radiation!

Isn't that awesome?

It's caused by particles moving faster than the speed of light in a particular dielectric medium. Usually you see it in nuclear reactors caused by beta particles in water.

It's easy to get tricked by the wording. Nothing that we know of moves faster than c (the speed of light in a vacuum). That doesn't imply that light is the fastest thing in any given medium, however.

The concept is similar to a sonic boom. A bunch of wave fronts build up and (thanks to the Doppler effect) eventually get shifted into the visual range of light.

I love that shade of blue 8)

(3 comments | Leave a comment)


[User Picture]
Date:June 4th, 2004 09:00 pm (UTC)
[User Picture]
Date:March 22nd, 2009 08:23 am (UTC)
So -- as it happens, I'm looking back through comments and...I'm confused. You *seem* cool, you commented in my journal, yet your name/profile/lj isn't familar. So I must ask:

1) Do I know you somehow and suck tremendously at remembering people from five years ago? Have I just rediscovered someone awesome?
2) Do you by any chance remember how you happened across me?
[User Picture]
Date:March 22nd, 2009 10:41 am (UTC)
I have no idea...I don't remember either.

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