Physics Help Forum Light speed

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 Jun 3rd 2013, 11:49 PM #1 Junior Member   Join Date: Jun 2013 Posts: 3 Light speed Can neutrino cross the maximum speed of light 3X10^8 m/s if it is accelerated and disintregated??
Jun 5th 2013, 12:57 PM   #2

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 Originally Posted by sant1234 Can neutrino cross the maximum speed of light 3X10^8 m/s if it is accelerated and disintregated??
There was a recent experiment that suggested a mass for the electron neutrino? Or was it a tau neutrino? Anyway it's an almost ignorable mass so let's assume for now that the three neutrino types are all massless. In this case all three, being massless, travel at the speed of light. You can't accelerate them in a "traditional" way. However this is an interesting problem since even though they interact with almost nothing even if a neutrino has no mass it still has energy so just like a photon: a black hole will have an effect on its trajectory. So yes, we can accelerate even a massless neutrino. (Recall that a curvature of the flight path of a particle indicates that there is an acceleration even though the speed might be constant.)

I'm not sure what you mean by "disintegrated?" All information (what little there is) would suggest that a neutrino, massive or otherwise, is a point particle like the electron and the quarks and the like.

-Dan
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 Jun 6th 2013, 12:11 AM #3 Junior Member   Join Date: Jun 2013 Posts: 3 Thanks for the reply. I mean "disintegrated" as making small parts of it by which each part will get more energy and acceleration, I think this concept is not totally applicable to it. Anyway, black hole may have a great role in accelerating neutrino over light speed. Im just thinking of what will happen with a speed more than 3X10^8 m/s, if it happens I think more sophisticated theory than Einsteins general relativity may be required.
Jun 6th 2013, 06:20 AM   #4

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 Originally Posted by sant1234 Thanks for the reply. I mean "disintegrated" as making small parts of it by which each part will get more energy and acceleration, I think this concept is not totally applicable to it. Anyway, black hole may have a great role in accelerating neutrino over light speed. Im just thinking of what will happen with a speed more than 3X10^8 m/s, if it happens I think more sophisticated theory than Einsteins general relativity may be required.
The only acceleration of the neutrino occurs as a change in the direction of its velocity, not its linear speed. Nothing we have detected goes faster than the speed of light.

Tachyons, particles that are predicted to go faster than light, have conceptually been around for a while, but no one has detected one.

-Dan
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 Jun 6th 2013, 07:23 AM #5 Junior Member   Join Date: Jun 2013 Posts: 3 yap I hope so.

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