Register to reply

Speed of light barrier

by KingNothing
Tags: barrier, light, speed
Share this thread:
KingNothing
#1
Mar15-12, 02:28 AM
P: 949
I am not an expert on Physics and have for the past year been engulfed in work, so I am very rusty. I read a comment online recently that essentially said the laws of physics simply prevent any object from accelerating to the speed of light (infinite energy required?), but do not say that an object traveling at the speed of light would necessarily be violating physical laws.

Is it true that the commonly-understood law that "no object can travel at or above the speed of light" is derived entirely from an inability of said object to accelerate to the speed of light?
Phys.Org News Partner Physics news on Phys.org
Mapping the optimal route between two quantum states
Spin-based electronics: New material successfully tested
Verifying the future of quantum computing
tiny-tim
#2
Mar15-12, 02:41 AM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,157
Hi KingNothing!
Quote Quote by KingNothing View Post
Is it true that the commonly-understood law that "no object can travel at or above the speed of light" is derived entirely from an inability of said object to accelerate to the speed of light?
Yes.

An object of zero rest-mass must travel at the speed of light.

Any object that was created with speed faster than light would have to stay faster than light (for the same reason it can't be accelerated down to the speed of light)
however, such objects would violate causality, so we believe they can't exist.
KingNothing
#3
Mar15-12, 02:59 AM
P: 949
Thank you kindly Mr. tiny-tim!

tiny-tim
#4
Mar15-12, 03:10 AM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,157
Speed of light barrier

Your Majesty is most gracious.


Register to reply

Related Discussions
Light speed barrier / closing speed Special & General Relativity 4
Idea for light speed or possibly faster than light speed travel? Quantum Physics 1
Scientists claims light speed barrier broken Special & General Relativity 19
Re: Breaking the Light Barrier & Tachyon/Synchron Mechanics. General Physics 0
The Light barrier Special & General Relativity 3