papascooby

Go with me on this....

You're driving through space at lightspeed in you car. (yes it's theoretical)

You switch your headlights on

Do you see the light from them?

comic cuts

If you're travelling at the same speed as the light then surely you would always be the same as we are at work........mushrooms!!!! Left in the dark.

SiDHEaD

Surely as soon as any light is emitted you've already passed it, So it should build up in the light unit but never emit infront..

suprabeast

no you wont see light in front of the car because before the light has time to travel infront of you, you have moved into that space yourself

Old_Fart

You can't move at lightspeed as your car becomes infinitely heavy and you therefore require infinite amounts of energy as you approach C. Hawking didn't answer 'cos it's a stupid question
Cman

TelBoy

Not to the boys on the Saxo Forums it isn't...

lightning101

http://www.physicsmyths.org.uk/lightspeed.htm

This explains it.

comic cuts

Maybe this is supercar......light and light years ahead of the old Cortina!!!

tiggers

Yeah, but a Scoob will still be faster in the twisties

davegtt

no it wouldnt because if u was travelling at light speed you'd be time travelling

jasey

Yes you would - the light from your lights is travelling at the speed of light away from you - So you would see just the same as if you were stationary. Tail-lights / rear fogs becomes a little tricky in your rear view mirror

lightning101

In Newtonian physics, time is a constant. Time is experienced by all people at the same rate. Also forces are propogated instantly. Gravitational effects are felt instantly at all points in the universe. Einsteins special theory of relativity had shown that cannot be true. Nothing can break the light speed barrier, due to the infinite energy and the time for object at lightspeed being zero, so greater than light speed would mean negative time! This contradicts Newton, so Einstein needed a new view of gravity. This he brought out in 1915, and it was called the general theory of relativity.

Newton described gravity as a force. Einstein described it as a form of geometry. To picture this, imagine a rubber sheet stretched out and suspended. That is the universe without any objects, and so without gravity.

If a ball is dropped onto the sheet, a depression is made, and that is what gravity is, a warping of the geometry of space. When light from a distant star is observed passing another star, it looks like it is bent by gravity. The fact is it is going in a straight line through Einsteins geometry, and it is only from our viewpoint does it look bent

paulr

If it was a scooby in a lake,would the light not refract in the water therefore appear at the side?

jasey

That sounds like a Maybe then

davegtt

lightening 101, Ive never heard so much bo11ocks Einstein knew nowt. Issac was the daddy...lmao

Geezer

No, light speed is finite, no matter how fast the object emitting it is moving. It's a pointless question, you cannot travel at the speed of light. It's like what would happen if an irresistable force met an immovable object? It just cannot be.

Geezer

TelBoy

Where's carl when you need him?

suprabeast

light particles travel at the speed of light though dont they??

lightning101

Stephen Hawking would of just said eeeeennnnnnggggghhhhh

lightning101

They looked happy here, but they had not read scoobnets latest thread.

TelBoy

Good question, well asked.

106rallye

Mass appears to increase as you approach the speed of light so if you have any mass at all you cannot reach it, if you have no mass eg a photon then you can reach the speed of light. Courtesy of Einstein’s theory of special relativity

lightning101

(AP) -- Scientists have apparently broken the universe's speed limit.

For generations, physicists believed there is nothing faster than light moving through a vacuum -- a speed of 186,000 miles per second.

But in an experiment in Princeton, New Jersey, physicists sent a pulse of laser light through cesium vapor so quickly that it left the chamber before it had even finished entering.

The pulse traveled 310 times the distance it would have covered if the chamber had contained a vacuum.

Researchers say it is the most convincing demonstration yet that the speed of light -- supposedly an ironclad rule of nature -- can be pushed beyond known boundaries, at least under certain laboratory circumstances.

Geezer

Yes, but photons are massless particles, and light is strange stuff, so it is the only thing that can travel at the speed of light

Geezer

lightning101

According to the special theory of relativity, the speed of particles of light in a vacuum, such as outer space, is the only absolute measurement in the universe. The speed of everything else -- rockets or inchworms -- is relative to the observer, Einstein and others explained

jasey

Yeah yeah - My Lasers faster than yours - heard it all before - LIAL

suprabeast

does the speed of light vary depending upon what medium it is travelling through??

Jay m A

iTrader: (2)

..and his Metal Micky translater thingy would have interpreted that as

"since the car is travelling at the speed of light, and the light emitted from the headlight is travelling at the speed of light, their speed relative to each other (assuming the car is travelling in the same direction as the headlight beam) is zero, hence the light emitted would just sit in the bulb and never escape. Nurse could you change my bag please?"

or something like that

lightning101

Yes, anthing that is not a complete vacuum would affect lightspeed.


Even space is not a complete vaccuum, but it is closest thing we can perceive

suprabeast

well my question was leading towards.. since we cannot make a perfect vacuum... how do we know exactly how fast light can travel??