Quote:
Originally posted by Sapper
Ouch.
Newton's third law defines to reaction pair forces. Light is not a force as for force = mass x acceleration. Light as we understand it has no mass (which I disagree with).
In this question, to my understanding .. the point can only propogate as fast as the movement of both "blades".
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Light does have mass. Otherwise it would not be able to travel hence the speed of light. Light is consists of vibrating/depolorising (i cant remember which) particals. The particals are still constitued as mass. Just not very big mass. A by product of light is heat. This heat can be considered some of the opposing force of light hence why lasers are so hot. Just a thought.