one thread thursday
02-11-2016, 10:31 AM
#10
Call me Pebbles
iTrader: (11)
Join Date: Nov 2011
Location: I do all my own physics.
Posts: 5,908
Car Info: Moist
Gravity waves, I have to make this quick.
Einstein postulated that space and time are interwoven in a 4-dimensional "fabric". Gravity, as good ol' Al envisioned it, distorts space-time. Imagine a sheet stretched out. Place a massive object on it, such as a baseball. The weight of the baseball will bend and stretch the sheet downward. Take a more massive object, such as a bowling ball. The bowling ball will have a similar effect, but more pronounced. Mass, in 4-D space-time, behaves in a similar way. Gravity was viewed as the force acting between two objects, but it was not known, specifically, how that "information" was transmitted between the two objects. Was it, "Hey. I'm here. Come towards me."? Was it a particle emitted from one acting on the other?
Today, it was announced that evidence suggests that gravity propagates as waves or distortions in space-time. This is big for two reasons.
The first, we now know how gravity "travels". The details of the experiment are actually quite fascinating. The LIGO consists of two 4 kilometer long laser ranges set at a 90-degree angle to each other (imagine a gigantic "L"). The hypothesis of this experiment was that if there are no localized distortions or ripples in space-time (woah.. Star Trek stuff), the laser pulses sent down each tube, in exactly 180 degree phase opposition (when one is up, the other is down) should go down and back in exactly the same amount of time with not variations in the wavelengths or phase difference and cancel each other out. Thanks to the collision of two black holes, gravitational waves were sent out and these were detected by LIGO as a phase variation in the interferometer by a non-zero signal.
The second, although no less important, since we now know that gravity waves exists, we can now measure the speed at which gravitational interactions occur.
Very exiting time for the field.
Einstein postulated that space and time are interwoven in a 4-dimensional "fabric". Gravity, as good ol' Al envisioned it, distorts space-time. Imagine a sheet stretched out. Place a massive object on it, such as a baseball. The weight of the baseball will bend and stretch the sheet downward. Take a more massive object, such as a bowling ball. The bowling ball will have a similar effect, but more pronounced. Mass, in 4-D space-time, behaves in a similar way. Gravity was viewed as the force acting between two objects, but it was not known, specifically, how that "information" was transmitted between the two objects. Was it, "Hey. I'm here. Come towards me."? Was it a particle emitted from one acting on the other?
Today, it was announced that evidence suggests that gravity propagates as waves or distortions in space-time. This is big for two reasons.
The first, we now know how gravity "travels". The details of the experiment are actually quite fascinating. The LIGO consists of two 4 kilometer long laser ranges set at a 90-degree angle to each other (imagine a gigantic "L"). The hypothesis of this experiment was that if there are no localized distortions or ripples in space-time (woah.. Star Trek stuff), the laser pulses sent down each tube, in exactly 180 degree phase opposition (when one is up, the other is down) should go down and back in exactly the same amount of time with not variations in the wavelengths or phase difference and cancel each other out. Thanks to the collision of two black holes, gravitational waves were sent out and these were detected by LIGO as a phase variation in the interferometer by a non-zero signal.
The second, although no less important, since we now know that gravity waves exists, we can now measure the speed at which gravitational interactions occur.
Very exiting time for the field.
02-11-2016, 10:41 AM
#12
Moist IT Outsourcing Services
Join Date: Aug 2010
Location: Indian Ocean
Posts: 5,331
Car Info: Mahindra Tractor
Forreal?
Fascinating stuff.
Gravity waves, I have to make this quick.
Einstein postulated that space and time are interwoven in a 4-dimensional "fabric". Gravity, as good ol' Al envisioned it, distorts space-time. Imagine a sheet stretched out. Place a massive object on it, such as a baseball. The weight of the baseball will bend and stretch the sheet downward. Take a more massive object, such as a bowling ball. The bowling ball will have a similar effect, but more pronounced. Mass, in 4-D space-time, behaves in a similar way. Gravity was viewed as the force acting between two objects, but it was not known, specifically, how that "information" was transmitted between the two objects. Was it, "Hey. I'm here. Come towards me."? Was it a particle emitted from one acting on the other?
Today, it was announced that evidence suggests that gravity propagates as waves or distortions in space-time. This is big for two reasons.
The first, we now know how gravity "travels". The details of the experiment are actually quite fascinating. The LIGO consists of two 4 kilometer long laser ranges set at a 90-degree angle to each other (imagine a gigantic "L"). The hypothesis of this experiment was that if there are no localized distortions or ripples in space-time (woah.. Star Trek stuff), the laser pulses sent down each tube, in exactly 180 degree phase opposition (when one is up, the other is down) should go down and back in exactly the same amount of time with not variations in the wavelengths or phase difference and cancel each other out. Thanks to the collision of two black holes, gravitational waves were sent out and these were detected by LIGO as a phase variation in the interferometer by a non-zero signal.
The second, although no less important, since we now know that gravity waves exists, we can now measure the speed at which gravitational interactions occur.
Very exiting time for the field.
Einstein postulated that space and time are interwoven in a 4-dimensional "fabric". Gravity, as good ol' Al envisioned it, distorts space-time. Imagine a sheet stretched out. Place a massive object on it, such as a baseball. The weight of the baseball will bend and stretch the sheet downward. Take a more massive object, such as a bowling ball. The bowling ball will have a similar effect, but more pronounced. Mass, in 4-D space-time, behaves in a similar way. Gravity was viewed as the force acting between two objects, but it was not known, specifically, how that "information" was transmitted between the two objects. Was it, "Hey. I'm here. Come towards me."? Was it a particle emitted from one acting on the other?
Today, it was announced that evidence suggests that gravity propagates as waves or distortions in space-time. This is big for two reasons.
The first, we now know how gravity "travels". The details of the experiment are actually quite fascinating. The LIGO consists of two 4 kilometer long laser ranges set at a 90-degree angle to each other (imagine a gigantic "L"). The hypothesis of this experiment was that if there are no localized distortions or ripples in space-time (woah.. Star Trek stuff), the laser pulses sent down each tube, in exactly 180 degree phase opposition (when one is up, the other is down) should go down and back in exactly the same amount of time with not variations in the wavelengths or phase difference and cancel each other out. Thanks to the collision of two black holes, gravitational waves were sent out and these were detected by LIGO as a phase variation in the interferometer by a non-zero signal.
The second, although no less important, since we now know that gravity waves exists, we can now measure the speed at which gravitational interactions occur.
Very exiting time for the field.
02-11-2016, 10:58 AM
#13
Dirty Purple Ukrainian
Thread Starter
iTrader: (1)
Join Date: Mar 2010
Location: In the Purple Land
Posts: 4,431
Car Info: SUBARU BROOM
gravity waves, i have to make this quick.
Einstein postulated that space and time are interwoven in a 4-dimensional "fabric". Gravity, as good ol' al envisioned it, distorts space-time. Imagine a sheet stretched out. Place a massive object on it, such as a baseball. The weight of the baseball will bend and stretch the sheet downward. Take a more massive object, such as a bowling ball. The bowling ball will have a similar effect, but more pronounced. Mass, in 4-d space-time, behaves in a similar way. Gravity was viewed as the force acting between two objects, but it was not known, specifically, how that "information" was transmitted between the two objects. Was it, "hey. I'm here. Come towards me."? Was it a particle emitted from one acting on the other?
Today, it was announced that evidence suggests that gravity propagates as waves or distortions in space-time. This is big for two reasons.
The first, we now know how gravity "travels". The details of the experiment are actually quite fascinating. The ligo consists of two 4 kilometer long laser ranges set at a 90-degree angle to each other (imagine a gigantic "l"). The hypothesis of this experiment was that if there are no localized distortions or ripples in space-time (woah.. Star trek stuff), the laser pulses sent down each tube, in exactly 180 degree phase opposition (when one is up, the other is down) should go down and back in exactly the same amount of time with not variations in the wavelengths or phase difference and cancel each other out. Thanks to the collision of two black holes, gravitational waves were sent out and these were detected by ligo as a phase variation in the interferometer by a non-zero signal.
The second, although no less important, since we now know that gravity waves exists, we can now measure the speed at which gravitational interactions occur.
Very exiting time for the field.
Einstein postulated that space and time are interwoven in a 4-dimensional "fabric". Gravity, as good ol' al envisioned it, distorts space-time. Imagine a sheet stretched out. Place a massive object on it, such as a baseball. The weight of the baseball will bend and stretch the sheet downward. Take a more massive object, such as a bowling ball. The bowling ball will have a similar effect, but more pronounced. Mass, in 4-d space-time, behaves in a similar way. Gravity was viewed as the force acting between two objects, but it was not known, specifically, how that "information" was transmitted between the two objects. Was it, "hey. I'm here. Come towards me."? Was it a particle emitted from one acting on the other?
Today, it was announced that evidence suggests that gravity propagates as waves or distortions in space-time. This is big for two reasons.
The first, we now know how gravity "travels". The details of the experiment are actually quite fascinating. The ligo consists of two 4 kilometer long laser ranges set at a 90-degree angle to each other (imagine a gigantic "l"). The hypothesis of this experiment was that if there are no localized distortions or ripples in space-time (woah.. Star trek stuff), the laser pulses sent down each tube, in exactly 180 degree phase opposition (when one is up, the other is down) should go down and back in exactly the same amount of time with not variations in the wavelengths or phase difference and cancel each other out. Thanks to the collision of two black holes, gravitational waves were sent out and these were detected by ligo as a phase variation in the interferometer by a non-zero signal.
The second, although no less important, since we now know that gravity waves exists, we can now measure the speed at which gravitational interactions occur.
Very exiting time for the field.
