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Can you explain

Akhilesh Trivedi
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Joined: Jun 22, 2005
Posts: 1526
If you're traveling at the speed of light and you turn your
headlights on, what happens?


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Chetan Parekh
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Joined: Sep 16, 2004
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Nice question


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Pradeep bhatt
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Joined: Feb 27, 2002
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Originally posted by Chetan Parekh:
Nice question


Nice answer.


Groovy
Rick Beaver
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Joined: Dec 14, 2004
Posts: 464
I think the light from your head lights would be moving at the speed of light relative to you - or 2x speed of light to a stationary observer. You would still see your headlights just like normal.

I am justifying this with this example - but I may be missing a fundamental understanding of relativity here: If you are driving your car at 50mph and throw an apple out the window at 10mph - the apple is travelling at 10mph relative to you (it will still move away from you at 10mph) - but if the apple hits a stationary observer - they are hit by an apple travelling 60mph
[ October 06, 2005: Message edited by: Rick Beaver ]

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Pradeep bhatt
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http://www.physlink.com/Education/AskExperts/ae169.cfm


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Michael Ernest
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If you put instant coffee in a microwave, would you go back in time?


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Stan James
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Joined: Jan 29, 2003
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If you travel at the speed of light and turn your headlights on you will get pulled over.

Heisenberg got pulled over for speeding. The cop said "Do you know how fast you were going?" and he said "No, but I know exactly where I am!"


A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
kayal cox
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Joined: Aug 19, 2004
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Originally posted by Stan James:
Heisenberg got pulled over for speeding. The cop said "Do you know how fast you were going?" and he said "No, but I know exactly where I am!"

LOL
Stephen Boston
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Joined: Jul 14, 2005
Posts: 165
Speed of light and headlights...

How would you be able to tell?


Steve<br /> <br />No matter where you go, there you are.<br /> <br />"My evil self is at the door, and I have no power to stop it."
Henry Wong
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Joined: Sep 28, 2004
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  40

In my opinion, you will see your headlights shine at the speed of light. You will also think you are moving close to, but not exactly, at the speed of light. (not exactly possible since you have mass)

From a third party reference, they too, will see your headlights shine at the speed of light. However, they will see you moving at a rate much much slower than the speed of light.

Anyway, how does this resolve? Once you decide to stop, mere minutes may have passed in your timeframe, while it could be years from the third party's perspective.

As a side note, determining your true speed also has some issues. After all, how do you know that you are travelling near the speed of light?

Henry
[ October 05, 2005: Message edited by: Henry Wong ]

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Dave Lenton
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Joined: Jan 20, 2005
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Originally posted by Henry Wong:
After all, how do you know that you are travelling near the speed of light?


When you get a speeding ticket costing more then the average women's shoe shopping trip?


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