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 Subject: Astronomy Category: Science > Astronomy Asked by: ceowang-ga List Price: \$3.00 Posted: 04 Dec 2002 02:12 PST Expires: 03 Jan 2003 02:12 PST Question ID: 118993
 `What effects might be experienced as your velocity approaches the speed of light?`
 Subject: Re: Astronomy Answered By: peggy_bill-ga on 04 Dec 2002 09:53 PST
 ```Hello ceowang, As your velocity approaches the speed of light, distances you observe shorten, your mass decreases and time for you slows down. Your mass will decrease because nothing with mass can reach the speed of light. Time will slow down so that light still travels at 300000 km/s relative to you. Here are some web sites that go into more specific detail. Imagine the Universe http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970102c.html Special Relativity http://www.mtnmath.com/whatth/node50.html I am driving my car at the speed of light and I turn on my headlights. What do I see? http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/headlights.html I hope that answers your question pba Keywords Used: Approach speed of light ://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=approach+speed+of+light&btnG=Google+Search```
 ```If it was possible for you to travel near the speed of light, three things relative to you are affected -- time, length and mass. Time runs slower for you (time dilation), the length of your body relative to the direction of motion decreases (fitzgerald-lorentz contraction), and your body mass increases. As your body increases in mass, the gravitational pull of that body and around it becomes tremendous that it will crush you to death. This is why scientists agree that for us to accelerate near lightspeed is an impossibility. If we are going to travel by rocket, as we gain mass, the more force is needed to push that mass forward. More force means more fuel and given that the thrust of the rocket is constant, it will not be enough to move us forward and so ultimately we will return to our normal state of existence far from the weird world of traveling near lightspeed. You will find more info through this link: ://www.google.com/search?q=%22speed+of+light%22+%22what+effects%22&sa=Google+Search&cat=&hl=en Feilong```
 ```Hi ceowang Failong thinks that your mass will increase and peggy that it will decrease. 'are we being confused yet?' In reality, there will be no effect. In special relativity all inertial systems feel the same. The speed, that is relative speed, is a property of any pair of systems, it is not 'your' characteristics. No absolute speed has been defined. It is a classical thinking to imagine that 'close to the speed of light' you will experience weird effects yourself. Using google to understand relativity has some dangers: Physics is not a collection of facts and factoids but rather a deductive reasoning about data. Most people still do think clasically (at any speed) -- and ga researchers, as the answers show, are only human.... Sorry about that hedgie Re your transparency question, this URL says it happened at T=2700 C http://www.space.com/php/multimedia/imagedisplay/img_display.php?pic=boom_map_red_green_02.jpg&cap=This%20image%20of%201,800%20square%20degrees%20of%20the%20southern%20sky%20was%20taken%20using%20the%20BOOMERANG%20telescope%20for%2010%20days%20from%20December%201998%20-%20January%201999.%20The%20apparent%20size%20of%20the%20moon%20is%20at%20the%20bottom%20right.%20This%20image%20shows%20the%20dis ant%20Universe%20as%20it%20transitions%20from%20a%20glowing%202700%20deg%20C%20plasma%20to%20a%20transparent%20gas,%20about%2014%20billion%20years%20ago.```
 ```E=mc2 - as you approach the speed of light your mass will increase and you will require more and more energy to speed up further up to the point where you need infinite energy to reach the speed of light. Therefore nothing with mass can move at the speed of light. Protons (light) can move at the speed of light because they have no mass - I read this somewhere but it's hard to image something with no mass.```
 ```Darrenw " your mass will increase .." is a standard cliche, which people read somewhere - and do not know what it means. This is not a newsgroup, to have a flame wars in and so it is not enough to repeat the chants. The words 'approaching a speed' and word 'mass' are not well defined and so the answer has to be ambiguous, unless the words are defined. That's what I have done partly in my comment: speed can mean relative speed of two inertial observers. Acording to basic postulate of SR, both observe the same physics. What I have described are two inertial observers, moving with a large, constant speed, with respect to each other. Let's say the relative speed is close to c (that is one meaning of approaching). If each observer will measure his/her own mass, s/he will find it is 'normal' - let's say 50kg. It is call a rest mass. It is not going up or down. Now, if you thing my statement is wrong, please do say so - but address the statement in precise terms. hedgie```