Matter Discovered Traveling at Near Light Speed 403
mcgrew writes to mention New Scientist is reporting that scientists have clocked matter traveling at 99.999% the speed of light. "The fastest flows of matter in the universe shoot out of dying stars at more than 99.999% the speed of light, new observations reveal. When a massive star runs out of fuel, it collapses to form a black hole or a neutron star. In the process, some of the matter from the star also explodes outward at blistering speeds, producing an intense burst of gamma rays and other radiation."
Kudos to the editor (Score:5, Informative)
(The original subject line said "Matter found travelling at the speed of light", or something along those lines.
Close != At.
Given all the Complaints and BS the mods have to put up with sometimes, I think they should get complimented for a job well done as well.
To be clear... (Score:5, Informative)
Re:Question? (Score:3, Informative)
Re:Speed of sound (Score:5, Informative)
Re:What's the speed of force? (Score:1, Informative)
Re:What's the speed of force? (Score:5, Informative)
Re:What's the speed of force? (Score:4, Informative)
Re:What's the speed of force? (Score:5, Informative)
Re:What's the speed of force? (Score:3, Informative)
Also, thanks to Newton's Third Law, space is like Soviet Russia: In space, the pole pushes you [utk.edu].
Re:What's the speed of force? (Score:5, Informative)
No information can travel faster than the speed of light, as a general rule.
Re:Speed of Gravity (Score:5, Informative)
Re:Cause we've been there? (Score:1, Informative)
Re:I know what it is, I know what it is! (Score:2, Informative)
No need to link to a description. This is /. we all know! lol I can't wait till the new season of Futurama starts.
Bender is hilarious.
Re:Light is particles... (Score:5, Informative)
WTF does that mean? Dunno. OK screw that. No more Wiki for me.
Re:What's the speed of force? (Score:4, Informative)
Re:What's the speed of force? (Score:2, Informative)
Re:I am a genius (Score:2, Informative)
Re:I am a genius (Score:5, Informative)
Re:I am a genius (Score:3, Informative)
Incorrect (Score:3, Informative)
Re:Speed of Gravity (Score:1, Informative)
Re:Kudos to the editor (Score:1, Informative)
Re:Light is particles... (Score:4, Informative)
Crookes radiometer (the aforementioned little thingy with the black and white paddles) does not rotate due to light imparted momentum (the force is too small). This theory of the rotation is disproved by the fact that after a certain point making the vacuum in the bulb stronger reduces the effect, which is the opposite of the expected result if the rotation was due to radiation force.
The actual forces responsible for rotation are a combination of forces due to molecule movement between the hot and cold sides of the vanes near the edges. Wikipedia has a good write up about it here [wikipedia.org].
There is an invariant mass for an object, i.e. a quantity that remains the same in all reference frames. This can be calculated based on energy and momentum. True of photons as well. Photons don't have a rest mass because rest mass is defined as the mass of an isolated and at rest relative to the observer object. Photons can't be at rest relative to an observer (and if they are isolated they are travelling at c).
Re:I am a genius (Score:3, Informative)
Your post is right on. I might add that when relativistic effects become important for everyday objects might be a matter of application. For example, some GPS systems need to account for relativistic effects for the relativive motion of objects in orbit with respect to the surface of the earth (moving much smaller than 0.7c). It depends on the accuracy required.
Re:Kudos to the editor (Score:1, Informative)
Re:Kudos to the editor (Score:5, Informative)