# Car at light speed **URL:** \ **Category:** Factual Questions\ **Created:** [March 7, 2003, 2:39am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637 "2003-03-07T02:39:35Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![photons4life](https://avatars.discourse-cdn.com/v4/letter/p/f07891/32.png) [@photons4life](https://boards.straightdope.com/u/photons4life)\ **Post date:** [March 7, 2003, 2:39am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/1 "2003-03-07T02:39:35Z")
Can some one help me out on this. Say I got my car up to the speed of light (admittingly I would have to use premium gas) and turned on my headlights. What would happen? ---
**Author:** ![Harmonix](https://avatars.discourse-cdn.com/v4/letter/h/3ec8ea/32.png) [@Harmonix](https://boards.straightdope.com/u/Harmonix)\ **Post date:** [March 7, 2003, 2:41am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/2 "2003-03-07T02:41:24Z")
attract cops? ---
**Author:** ![Q.E.D](https://avatars.discourse-cdn.com/v4/letter/q/51bf81/32.png) [@Q.E.D](https://boards.straightdope.com/u/Q.E.D)\ **Post date:** [March 7, 2003, 2:42am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/3 "2003-03-07T02:42:39Z")
Wasn’t this a Steven Wright joke? ---
**Author:** ![MonkeyMensch](https://avatars.discourse-cdn.com/v4/letter/m/82dd89/32.png) [@MonkeyMensch](https://boards.straightdope.com/u/MonkeyMensch)\ **Post date:** [March 7, 2003, 2:45am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/4 "2003-03-07T02:45:23Z")
> [@](#): > > \*Originally posted by photons4life \* > \*\*Can some one help me out on this. Say I got my car up to the speed of light (admittingly I would have to use premium gas) and turned on my headlights. What would happen? \*\* Wasn’t this thread posted a while ago from the Zurich Patent Office? ---
**Author:** ![Thaumaturge](https://avatars.discourse-cdn.com/v4/letter/t/858c86/32.png) [@Thaumaturge](https://boards.straightdope.com/u/Thaumaturge)\ **Post date:** [March 7, 2003, 2:46am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/5 "2003-03-07T02:46:12Z")
Time would stop and you’d become infinately thin. ---
**Author:** ![Q.E.D](https://avatars.discourse-cdn.com/v4/letter/q/51bf81/32.png) [@Q.E.D](https://boards.straightdope.com/u/Q.E.D)\ **Post date:** [March 7, 2003, 2:51am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/6 "2003-03-07T02:51:53Z")
> [@](#): > > \*Originally posted by Thaumaturge \* > \*\*Time would stop and you’d become infinately thin. \*\* And infinitely massive. There’s a pretty picture. ---
**Author:** ![xash](https://avatars.discourse-cdn.com/v4/letter/x/c6cbf5/32.png) [@xash](https://boards.straightdope.com/u/xash)\ **Post date:** [March 7, 2003, 3:10am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/7 "2003-03-07T03:10:43Z")
The Master has spoken on this exact topic : [If you turn on your headlights while driving at the speed of light, what happens?](http://www.straightdope.com/classics/a3_143.html) ---
**Author:** ![xash](https://avatars.discourse-cdn.com/v4/letter/x/c6cbf5/32.png) [@xash](https://boards.straightdope.com/u/xash)\ **Post date:** [March 7, 2003, 3:49am UTC](https://boards.straightdope.com/t/car-at-light-speed/159637/8 "2003-03-07T03:49:28Z")
And some related ones : [If I fire a gun while near light speed, will the bullet EXCEED light speed?](http://www.straightdope.com/classics/a2_095.html) [Straight Dope Staff Report: What’s with news reports about things traveling faster than light?](http://www.straightdope.com/mailbag/mphasevel.html) [What would happen to sound if I traveled at Mach 1?](http://www.straightdope.com/classics/a1_116.html)