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speed of light

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Lili On July 12, 2019
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Sunshine Land,
#16New Post! Feb 26, 2009 @ 00:10:26
The constant is in a vacuum. Scientists have been able to manipulate the speed of light under various circumstances on earth. There was one experiment which made it so that light could actually be stopped and started at will using lasers and gas at temperatures close to absolute zero.
jonnythan On August 02, 2014
Bringer of rad mirth


Deleted



Here and there,
#17New Post! Feb 26, 2009 @ 01:08:59
@Lili Said

I thought I recalled reading about Einstein speculating that if he were a passenger on a train that was increasing in speed, approaching the speed of light, that if he looks outside the window, things would not be their ordinary color, they would start to take on a hue of the rainbow, kind of like the Dopler effect with sound, but with light. This effect is used in determining the location and velocity of stars for instance I believe, it's called red shift and blue shift. Anyways, so Einstein imagined that you would sort of pass through a rainbow effect as you approach the speed of light. So doesn't that mean that your headlights would not appear to work as normal at that speed?


That's right. Things would look incredibly bizarre. But by "the headlights would appear to work" I mean that the headlights themselves will look perfectly fine and, if you held your hand out in front of them and somehow measured the speed of the light coming from them, they would appear completely normal.
Lili On July 12, 2019
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Sunshine Land,
#18New Post! Feb 26, 2009 @ 01:30:27
But I thought that redshift and blue shift occur due to the stretching or compression of the lightwave due to the speed at which the light source is either getting farther or closer to you. I know I have read that the speed of light is always the speed of light regardless of what speed you're going, but if that's the case there should be no such thing as blue shift or red shift, right?
jonnythan On August 02, 2014
Bringer of rad mirth


Deleted



Here and there,
#19New Post! Feb 26, 2009 @ 01:34:38
@Lili Said

But I thought that redshift and blue shift occur due to the stretching or compression of the lightwave due to the speed at which the light source is either getting farther or closer to you. I know I have read that the speed of light is always the speed of light regardless of what speed you're going, but if that's the case there should be no such thing as blue shift or red shift, right?


The red/blue shift depends on the speed of the light source with respect to the observer.

In this case, the speed of the light source with respect to the observer is zero. The driver is moving with the headlights.
spadge On February 18, 2010
Aging Disgracefully


Deleted



Santa Land, United Kingdom
#20New Post! Feb 26, 2009 @ 01:38:51
OK, this maybe a little irrelevant, but a friend of mine was being a big head and was pretending to know the speed of light was so many miles per second. He then slipped on a dog turd and demonstrated it. I thought it was funny as hell.

Sorry, I thought I'd share that.
Lili On July 12, 2019
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Sunshine Land,
#21New Post! Feb 26, 2009 @ 02:03:01
@jonnythan Said

The red/blue shift depends on the speed of the light source with respect to the observer.

In this case, the speed of the light source with respect to the observer is zero. The driver is moving with the headlights.



Ahhh...thank you for correcting me on that.
jck200 On April 22, 2009




cardiff, United Kingdom
#22New Post! Mar 01, 2009 @ 23:02:52
Lili,

Do you know what light is exactly?

john
johnzdoe On October 11, 2018




New York, Russia
#23New Post! Sep 21, 2018 @ 18:53:08
well, so much for the opinions of the followers of the church of Scientism.
But they are guessing about light, despite what their high priest, Einstein claims.
Rational thinking says that if you could go as fast as light, and light cant exceed 300000000kps, then you would just keep pace with it. It would not shine ahead at a further 300000000kps in front of you.
But hey, thats just the rational, sensible logical way of looking at it.
chaski On March 28, 2024
Stalker





Tree at Floydgirrl's Window,
#24New Post! Sep 21, 2018 @ 19:12:26
@johnzdoe Said

well, so much for the opinions of the followers of the church of Scientism.
But they are guessing about light, despite what their high priest, Einstein claims.
Rational thinking says that if you could go as fast as light, and light cant exceed 300000000kps, then you would just keep pace with it. It would not shine ahead at a further 300000000kps in front of you.
But hey, thats just the rational, sensible logical way of looking at it.



I might be wrong, but I think it is 299,792 kilometers per second (kps) not 300,000,000 kps.

As to your "rational, sensible logical way of looking at it"...there are a number of paradoxes involving light, you "your" version of "rational, sensible logical way of looking at it" doesn't necessarily apply.

Have you tested your theory? Or you just pretending you know more that people who actually study the speed of light?
mrmhead On March 27, 2024




NE, Ohio
#25New Post! Sep 21, 2018 @ 19:59:03
I tried to study Light, but I just couldn't keep up.
Leon On December 21, 2023




San Diego, California
#26New Post! Sep 21, 2018 @ 21:18:10
I try not to study light for too long or I’ll go blind.
twilitezone911 On March 25, 2019




Saint Louis, Missouri
#27New Post! Sep 22, 2018 @ 20:16:21
I try to study light in my bathroom. every time, I take a shower. I got out of the mirror and flex muscles like the incredible hulk to show off to my reflection.

my reflection turn off the light.
chaski On March 28, 2024
Stalker





Tree at Floydgirrl's Window,
#28New Post! Sep 22, 2018 @ 20:25:07
@twilitezone911 Said

I try to study light in my bathroom. every time, I take a shower. I got out of the mirror and flex muscles like the incredible hulk to show off to my reflection.

my reflection turn off the light.



Does your reflection move at the speed of light? Or is it a constant? Or constantly changing its speed?
twilitezone911 On March 25, 2019




Saint Louis, Missouri
#29New Post! Sep 22, 2018 @ 20:27:54
@chaski Said

Does your reflection move at the speed of light? Or is it a constant? Or constantly changing its speed?


depending, when he stopping laughing at me.
mrmhead On March 27, 2024




NE, Ohio
#30New Post! Sep 22, 2018 @ 20:58:24
@chaski Said

Does your reflection move at the speed of light? Or is it a constant? Or constantly changing its speed?


Everything is fine and dandy until you start changing things.
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