/sci/ - Science & Math

yes.. the "speed" of gravity cannot exceed the speed of light.

if the sun disappeared we wouldn't notice the gravitational effects for 7-8 minutes

>>2486116
>Suppose a light bulb in a room was suddenly turned on, how fast would the room be illuminated?

I have a focus group looking into your question. They should get back to us after the first of the month.

>>2486141

>>2486125
Then we'd die horribly, right?

>>2486146
Those figures were better than expected.

>>2486125
That isn't proven. No-one has given a decent method of measuring the speed of gravity and all those that have have either given a roundabout way of measuring c or given a method that goes against the current understanding of the universe

>>2486116
31,557,600 light-seconds

>>2486159
It's what GR predicts. Unless you have a better evidence-supported theory, you should tone down the skepticism.

We're looking for the confirmation of gravity waves (or the absence thereof).

>>2486159
Information can't travel faster than light. Gravitational pull is information.

Tachyons?

>>2486178
You need your head examined.

http://en.wikipedia.org/wiki/Speed_of_gravity

>>2486178
Don't go against the dogma of science.

>>2486192
>speed of light in vacuum

Can the speed of light be affected by whether it's in a vacuum or not?

>>2486196
>dogma
>science
Pick one

>>2486214

Yes? Prisms and such, didn't you do this shit in high school?

>>2486220
That distinction is above my pay grade.

>>2486214
actually yes. the constant c is the measurement of the speed of light in a vacuum. In a non-vacuum environment the speed is slowed down depending on the matter it is traveling through..

light going through air travels very close to c. if light it traveling through glass or water then the speed is closer to 2/3 c

>>2486252

but if time is dependent on the speed of life, is that why everything seems slow-motion when you go swimming?

gravity varies depending on conditions

1 sun sized object will pull another small object into it in a vacuum pretty quick (unsure the exacts sry) but the bigger object 2 is the longer it will be

think about it this way, gravity is a magnet, it pulls it but the farther away the less of a pull

DO NOT FUCKING ASK IT

HEY GUYS HAVE YOU TRIED HOMEOPATHIC MEDICINE THIS WAS MY FACE WHEN I PUT ON MY MAGNET BRACELET GUYS

>>2486264
wtf are you talking about bro

>>2486264
water resistance bro

everything in the pool is going slower because the water holds you back a little

/feed troll

>>2486214
no light aways moves at c
it just that when in a medium it is constantly absorbed by electrons and then reemited
the direction in witch it will be reemited can be stimulated (as in the case with lasers)

for more info
http://en.wikipedia.org/wiki/Stimulated_emission

>>2486288
Then why can light be slowed? In conditions near absolute zero, light could be slowed to a near standstill and converted into matter. In that sense, could we encode such matter and make an information system system that travels at the speed of light?

>>2486295

It can't be slowed.

>>2486295
for all intents and purposes light cannot be slowed

(however i just think we don't know how to do it yet)

>>2486295

light is both a particle and a wave bro, meaning it isn't affected by cold. Also absolute zero is a myth (physically impossible)

>>2486295
>>2486295

I will use an analogy to explain my understanding of your idea.

We will slow down a mag-lev. train that goes 3000km/h to a complete stop instantly, so that we can put our own customized information (people) on this train.

After that, control its velocity to a point of interest and unload the information at the destination?

>>2486310
>>2486309
>>2486300
Then, can someone explain this article?
http://www.news.harvard.edu/gazette/1999/02.18/light.html

>>2486295
sorry forgot the most important part
when absorbed the electron or molecule need a while to emit the photon
the time of reemition depends on the temperature and the substance

>>2486321

Samefagging here,

Approaching the speed of light, in the same direction as the light stream, if a light stream were parallel to me (going as fast as light also) relatively, I would see the light beam in the same reference frame.

Observing the light beam, we would appear to be at a dead stop in comparison to the observers.

Then, since light is at a dead stop, I could encode light with the information I wanted and then slow back down to my original speed.

>>2486321
>>2486337
Yes, that's what I am attempting to get across.

>>2486325
>"When atoms become packed super-closely together at super-low temperatures and super-high vacuum"
>atoms packed super-closely together
>super-high vacuum

it depends on the mass of the two objects. i can assume that if they were strong enough to pull each other, it would happen instantly (slightly educated guess), since the electromagnetic fields would already be present in that one light year area

>>2486514
I take it that this has expanded your mind?

>>2486689
I don't understand the relevance of this view towards the slowing of light.

>>2486196
>dogma
>dog

>>2486711

>>2486759
wonderful, now apply that concept to the slowing of light.

>>2486175
you'd better tell the intel photonics team that they're wasting their time then

>>2486790

why do you think the light bends? the velocity or momentum of the light (a vector) is changed as can be seen by the change in direction of the photons