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Groups > sci.physics > #707392
| From | Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re:speed of light |
| Date | 2018-10-12 08:18 +0200 |
| Organization | news.eternal-september.org |
| Message-ID | <pppebc$ouo$1@dont-email.me> (permalink) |
| References | <c8bb0436-4134-4b41-807d-3a112a4b2164@googlegroups.com> |
ren.pirex@gmail.com Wrote in message: > if a body increases its speed until it reaches the speed of light, its mass increases gradually or increases at once? > What is the formula used to know the mass variation during this movement? > Its mass is constant, according the current formulations of theory of relativity. The increasing inertial mass is an obsolete idea, being in fact just energy equivalent. As inertial mass is direction dependent. E.g. inertial mass along motion is proportional to gamma, while perpendicularly to motion it is proportional to gamma^3, where gamma = 1/sqrt(1-(v/c)^2) -- Libor Striz aka Poutnik ( a pilgrim/wanderer/wayfarer) "Humour is the only effective weapon against stupidity." Miloš Forman ----Android NewsGroup Reader---- http://usenet.sinaapp.com/
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speed of light ren.pirex@gmail.com - 2018-10-11 21:48 -0700
Re:speed of light Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-10-12 08:18 +0200
Re: speed of light ren.pirex@gmail.com - 2018-10-12 07:39 -0700
Re: speed of light mitchrae3323@gmail.com - 2018-10-12 12:45 -0700
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