NormanDunbarIf I'm in a space ship, travelling at the speed of light, what happens if I turn on the headlights?
Màrtainn D 
@NormanDunbar they will still illuminate the view ahead. Everything in your frame of reference will seem the same as usual. That’s the wonderful world of relativity 😵💫
@ginger_tosser I did know that, but thanks. I love all that mentally challenging physics! I can't do any of it, but I absolutely love it. 😕
@NormanDunbar tbh, I can’t do any of it now either. I also never got the hang of the electronics stuff you do because school taught that current was the flow of electrons but uni assumed we used the flow of holes. So for the first 6 months we the diagrams made no sense and all our hand rules didn’t work.
@ginger_tosser Aye. School says current flows +ve to -ve, but it's the other way around!
Prema Marsik@NormanDunbar photons will fall from the lamps on the floor #lowqualityfacts
Abram Kedge🏴🇨🇦@NormanDunbar If you're exactly at the speed of light (which would mean that you would have to be massless, to achieve that speed) then you wouldn't have time to see if the headlights are on.
Wherever you were going to end up, from your frame of reference you're already there - no time elapses for you.
Matt Mascarenhas@AbramKedge @NormanDunbar Yeah, that's what I'd have thought. And an observer would see the headlights illuminated, but not lighting up the space ahead?
Then for the rear lights, an observer would see them not even illuminated, because the whole thing – ship and light – is speeding away from them?
@miblo @AbramKedge It's all a bit too relative for my tiny brain! 😭
@NormanDunbar @AbramKedge Hehe! Aww no, I could well be getting it wrong, myself. It's been years, decades since I read about this stuff. 🌌
Adam Jacobs 🇺🇦@NormanDunbar Then the spaceship coming towards you will be dazzled and may crash into you.
And if you have a crash at the speed of light, then that would be bad.