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Would Headlights Work at Light Speed?
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9,422,248 Views • Feb 25, 2015 • Click to toggle off description
If you were driving at the speed of light and turned on your headlights, what would happen?
Twitter: www.twitter.com/tweetsauce
Instagram: www.instagram.com/electricpants
Sources and extras below!!

Thanks to Jude for asking me this question on twitter! twitter.com/stefanikj5/status/550865272895447041

“The Life of the Cosmos” by Lee Smolin: www.amazon.co.uk/The-Life-Cosmos-Lee-Smolin/dp/019…
“In Search of the Multiverse” by John Gribbin: www.amazon.co.uk/In-Search-Multiverse-John-Gribbin…
“The Pig That Wants to be Eaten: by Julian Baggini: www.amazon.co.uk/The-Pig-That-Wants-Eaten/dp/18470…

Relevant MinutePhysics videos:

   • Common Physics Misconceptions  
   • E=mc² is Incomplete  
light slowing down in glass:    • The Speed of Light in Glass  
a different perspective from Sixty Symbols about light slowing down:    • Why is light slower in glass? - Sixty...  

Why is “c” the speed of light?

math.ucr.edu/home/baez/physics/Relativity/SpeedOfL…

Car at light speed:

www.sydneyobservatory.com.au/2010/what-happens-whe…
van.physics.illinois.edu/qa/listing.php?id=1355
www.scienceforums.net/topic/82191-i-am-driving-my-…
www.desy.de/user/projects/Physics/Relativity/Speed…

Light speed is the same in all inertial frames of reference:

www.physlink.com/Education/AskExperts/ae558.cfm
van.physics.illinois.edu/qa/listing.php?id=2605
hyperphysics.phy-astr.gsu.edu/hbase/relativ/mmhist…

Relativistic addition of velocities:

demonstrations.wolfram.com/EinsteinsFormulaForAddi…
cnx.org/contents/e3a41220-af3f-40c6-b8ba-1a5d1bcbe…

doppler shift:

commons.wikimedia.org/wiki/File:XYCoordinates.gif#…

Relativity:

www.refsmmat.com/jsphys/relativity/relativity.html
www.astro.virginia.edu/~jh8h/Foundations/quest7.ht…

Light speed and catching-up to light.

www.pitt.edu/~jdnorton/Goodies/Chasing_the_light/
math.ucr.edu/home/baez/physics/Relativity/SpeedOfL…
www.askamathematician.com/2010/11/q-what-would-you…
scienceline.ucsb.edu/getkey.php?key=1571
van.physics.illinois.edu/qa/listing.php?id=1354

Other good relativity resources: newt.phys.unsw.edu.au/einsteinlight/

Light echo footage: www.spacetelescope.org/videos/heic0617a/

“fine-tuned” universe:

io9.com/5989467/how-does-the-anthropic-principle-c…
en.wikipedia.org/wiki/Fine-tuned_Universe
rationalwiki.org/wiki/Anthropic_principle

Irrational numbers: mathworld.wolfram.com/IrrationalNumber.html

a million digits of pi: www.piday.org/million/

THERE'S MORE VSAUCE!!

Vsauce2: youtube.com/Vsauce2
Vsauce3: youtube.com/Vsauce3

animated drawings by Guy Larsen twitter.com/guylar
rocketship animation by Eric Langay twitter.com/ericlanglay
Metadata And Engagement

Views : 9,422,248
Genre: Science & Technology
Date of upload: Feb 25, 2015 ^^


Rating : 4.948 (3,288/250,015 LTDR)
RYD date created : 2022-04-09T14:05:49.96003Z
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YouTube Comments - 24,053 Comments

Top Comments of this video!! :3

@prebenkjernsby6312

5 years ago

Driving fast makes you live longer kids

11K |

@hardman666

6 years ago

would headlights work at light speed? conclusion: you are not real.

21K |

@prabhdeepsingh5642

1 year ago

It's interesting to see that even after so many years none of the Vsauce videos seems old. They are ageless.

3.4K |

@GanerRL

2 years ago

9:16 imagine if he said one sun instead of two

1.9K |

@saubererzauberer1230

3 years ago

9:15 - 9:25 Imagine if he said 1 sun instead of 2 just to mess with our heads

2K |

@michaelkeating9514

8 years ago

turning on headlights at light speed? ain't nobody got time for that

2.4K |

@aes0p895

1 year ago

Just dropped in for a quick existential crisis. Thanks Michael, you always deliver!

167 |

@robokaos69

1 year ago

Vsauce videos are as timeless as the experience of a photon

161 |

@_arnavmathur

3 years ago

8:04 - you know it's going more complex when that music turns on

1.3K |

@blazerona1329

7 years ago

How to make a vsauce video: 1. Start with a question that sounds interesting 2. Insert math 3. Put your viewers through an existential crisis 4. Profit

4.9K |

@masterofrussianbias8024

8 months ago

He should have said, "theres a universe of you watching this video but the earth only has 1 sun" would have been a mind fuck for a second

4 |

@jordanmicahcook

2 years ago

Michael: “While walking to your refrigerator for a snack, you will measure your fridge to be a one hundred quadrillionth of a meter nearer, and thinner, than you would while at rest with it.” Me: “Oh good! Glad I’m not the only one who noticed…”

35 |

@regittark9031

9 years ago

Thumbs up if your Earth DOES have two suns.

553 |

@ryseofthegamers9729

3 years ago

What I love about vsauce is that Michael can say something like “you can’t turn on the headlight, because you would feel like before you were conceived” , and make perfect sense in the context.

2.5K |

@shady8045

11 months ago

4:02 I love you making it this scale implies that the ships are extremely massive. Like literally bigger than earth I’m pretty sure and by a lot too

5 |

@paradox6647

1 year ago

Tbh, this is one of my favourite vsauce videos of all time, it contains so much information and ideas that literally bend my brain.

9 |

@asani9835

4 years ago

2:50 when you ask your German mom if you can go hang out with your friends

1.7K |

@leightonpetty4817

3 years ago

0:38 “And as always, thanks for watching”

486 |

@anariondanumenor9675

7 months ago

Its incredible that most popular comments in this video, with more than 2k likes, are like 1-2y Old. Im with you, those Old vsauce videos are timeless, kiss from PL

2 |

@artemisgray9463

1 year ago

Despite all my research and effort spent trying to understand the world/universe, light speed is the one thing that never fails to tie my brain in a knot.

7 |

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