Can Objects Travel at the Speed of Light?

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Discussion Overview

The discussion centers around the question of whether objects can travel at the speed of light, exploring the implications of physical laws regarding acceleration and the nature of mass. It touches on theoretical aspects of physics and the constraints imposed by relativity.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant suggests that the commonly-understood law preventing objects from traveling at or above the speed of light is based on the inability to accelerate to that speed due to infinite energy requirements.
  • Another participant asserts that objects with zero rest mass must travel at the speed of light and that any object created with a speed faster than light would have to remain faster than light, raising concerns about causality.
  • A later reply expresses gratitude, indicating a positive reception of the information shared.
  • Further replies maintain a light-hearted tone without introducing new technical content.

Areas of Agreement / Disagreement

The discussion presents multiple viewpoints regarding the nature of objects and their relationship to the speed of light, with some participants agreeing on the implications of mass and causality while others raise questions about the foundational understanding of these concepts. No consensus is reached.

Contextual Notes

The discussion does not resolve the complexities surrounding the definitions of mass and the implications of traveling at the speed of light, leaving these aspects open for further exploration.

KingNothing
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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?
 
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Hi KingNothing! :smile:
KingNothing said:
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. :wink:​
 
Thank you kindly Mr. tiny-tim!
 
Your Majesty is most gracious. :smile:
 

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