#SpeedOfLight Shankland in 1963 wrote: I asked Professor Einstein how long he had worked on the Special Theory of Relativity before 1905. He told me that he had started at age 16 and worked for ten years.
November 1, 2025 at 4:24 PM
#SpeedOfLight Shankland in 1963 wrote: I asked Professor Einstein how long he had worked on the Special Theory of Relativity before 1905. He told me that he had started at age 16 and worked for ten years.
#SpeedOfLight Notice that only the special theory of relativity agrees with all the experiments listed. This fact was a great advance for the theory of Einstein elaborated from a sad man in a patent office.
October 28, 2025 at 4:54 PM
#SpeedOfLight Notice that only the special theory of relativity agrees with all the experiments listed. This fact was a great advance for the theory of Einstein elaborated from a sad man in a patent office.
#SpeedOfLight De Sitter in 1913 proposed that if the speed of light is not equal to c but is equal to c + kv (where v is the speed of the reference system), then k must experimentally be very small, less than 1E-3.
October 24, 2025 at 5:19 PM
#SpeedOfLight De Sitter in 1913 proposed that if the speed of light is not equal to c but is equal to c + kv (where v is the speed of the reference system), then k must experimentally be very small, less than 1E-3.
#SpeedOfLight The experiment carried out in 1881 by Michelson and Morley in Potsdam led to the rejection of the existence of the ether.
October 22, 2025 at 3:51 PM
#SpeedOfLight The experiment carried out in 1881 by Michelson and Morley in Potsdam led to the rejection of the existence of the ether.
#SpeedOfLight Sound needs air to reach our ears. It was impossible for anything to propagate in a vacuum. For this reason, scientists invented the ether, which had zero density, was totally transparent at all frequencies, and permeated all space.
October 21, 2025 at 4:21 PM
#SpeedOfLight Sound needs air to reach our ears. It was impossible for anything to propagate in a vacuum. For this reason, scientists invented the ether, which had zero density, was totally transparent at all frequencies, and permeated all space.
#SpeedOfLight Scientists in the 19th century were convinced that light, and all electromagnetic waves, needed a medium to propagate. Mechanical waves that are transmitted by a string need the string itself to propagate.
October 20, 2025 at 2:15 PM
#SpeedOfLight Scientists in the 19th century were convinced that light, and all electromagnetic waves, needed a medium to propagate. Mechanical waves that are transmitted by a string need the string itself to propagate.
#SpeedOfLight The special theory of relativity (1905) considers reference systems moving with constant speed. In order to include accelerated reference frames, Einstein had to develop the general theory of relativity (1915).
October 17, 2025 at 5:52 PM
#SpeedOfLight The special theory of relativity (1905) considers reference systems moving with constant speed. In order to include accelerated reference frames, Einstein had to develop the general theory of relativity (1915).
#SpeedOfLight The most incredible thing is that Einstein developed all his theory completely alone, he was not in contact with the academic world, his interaction with the experts in this field of physics was null.
October 14, 2025 at 6:50 PM
#SpeedOfLight The most incredible thing is that Einstein developed all his theory completely alone, he was not in contact with the academic world, his interaction with the experts in this field of physics was null.
#SpeedOfLight Einstein used the law of conservation of energy and momentum in a very natural way, as if the components of light were objects of traditional mechanics but obeying the new laws of the special theory of relativity.
October 13, 2025 at 2:47 PM
#SpeedOfLight Einstein used the law of conservation of energy and momentum in a very natural way, as if the components of light were objects of traditional mechanics but obeying the new laws of the special theory of relativity.
#SpeedOfLight The theory of special relativity tells us how space and time change for observers who move at constant speeds. There is no state of rest or absolute movement. Also, something non-intuitive is: time is not absolute. Einstein was 26 in 1905 when he published his work.
October 10, 2025 at 5:11 PM
#SpeedOfLight The theory of special relativity tells us how space and time change for observers who move at constant speeds. There is no state of rest or absolute movement. Also, something non-intuitive is: time is not absolute. Einstein was 26 in 1905 when he published his work.
#SpeedOfLight This causes a small but not imperceptible relativistic time dilation producing a delay of 38.1 microseconds each day, wich can translate into a position discrepancy of 11.4 km.
October 7, 2025 at 4:55 PM
#SpeedOfLight This causes a small but not imperceptible relativistic time dilation producing a delay of 38.1 microseconds each day, wich can translate into a position discrepancy of 11.4 km.
#SpeedOfLight The network of satellites that provide coverage for a GPS move in geostationary orbits at a speed of 10,900 km/h, which is very small compared to the speed of light.
October 5, 2025 at 5:22 PM
#SpeedOfLight The network of satellites that provide coverage for a GPS move in geostationary orbits at a speed of 10,900 km/h, which is very small compared to the speed of light.
#SpeedOfLight The discrepancy is due to the fact that an observer on Earth sees the satellites in motion and, therefore, Special Relativity tells us that their clocks work more slowly, and therefore it must be taken into account to know our position on the terrestrial sphere.
October 3, 2025 at 3:51 PM
#SpeedOfLight The discrepancy is due to the fact that an observer on Earth sees the satellites in motion and, therefore, Special Relativity tells us that their clocks work more slowly, and therefore it must be taken into account to know our position on the terrestrial sphere.
#SpeedOfLight If relativistic effects were not taken into account, a car GPS that tells us that our destination is 2.6 km away would be making a mistake, the correct distance would be about 15 km.
October 1, 2025 at 5:10 PM
#SpeedOfLight If relativistic effects were not taken into account, a car GPS that tells us that our destination is 2.6 km away would be making a mistake, the correct distance would be about 15 km.
September 22, 2025 at 1:53 AM
#SpeedOfLight Magie made this comment in 1911, we must remember that the general theory of relativity had not yet been formulated. Magie did not even imagine the revolution that would come later in 1915, shocking scientific knowledge.
September 19, 2025 at 4:37 PM
#SpeedOfLight Magie made this comment in 1911, we must remember that the general theory of relativity had not yet been formulated. Magie did not even imagine the revolution that would come later in 1915, shocking scientific knowledge.
#SpeedOfLight On December 28, 1911, Princeton University professor W. F. Magie (founder of the American Physical Society and president from 1910 to 1912) said that he could not accept the basic postulates of the theory of relativity, at a meeting of APS.
September 18, 2025 at 3:00 PM
#SpeedOfLight On December 28, 1911, Princeton University professor W. F. Magie (founder of the American Physical Society and president from 1910 to 1912) said that he could not accept the basic postulates of the theory of relativity, at a meeting of APS.
#SpeedOfLight While working in the patent office, Albert Einstein's deep reflections on the Maxwell and Lorentz problems of electrodynamics led him to create the special theory of relativity.
September 17, 2025 at 4:37 PM
#SpeedOfLight While working in the patent office, Albert Einstein's deep reflections on the Maxwell and Lorentz problems of electrodynamics led him to create the special theory of relativity.
#Science #Physics
#SpeedOfLight #Light #SpaceTime
#SpecialRelativity #Galileo #Newton #Maxwell #Lorentz #Einstein
And now for some 'light' entertainment ...
"The Speed of Light is NOT About Light" (PBS Space Time, Oct 7, 2015)
www.youtube.com/watch?v=msVu...
#SpeedOfLight #Light #SpaceTime
#SpecialRelativity #Galileo #Newton #Maxwell #Lorentz #Einstein
And now for some 'light' entertainment ...
"The Speed of Light is NOT About Light" (PBS Space Time, Oct 7, 2015)
www.youtube.com/watch?v=msVu...
The Speed of Light is NOT About Light
YouTube video by PBS Space Time
www.youtube.com
August 8, 2025 at 11:20 PM
#Science #Physics
#SpeedOfLight #Light #SpaceTime
#SpecialRelativity #Galileo #Newton #Maxwell #Lorentz #Einstein
And now for some 'light' entertainment ...
"The Speed of Light is NOT About Light" (PBS Space Time, Oct 7, 2015)
www.youtube.com/watch?v=msVu...
#SpeedOfLight #Light #SpaceTime
#SpecialRelativity #Galileo #Newton #Maxwell #Lorentz #Einstein
And now for some 'light' entertainment ...
"The Speed of Light is NOT About Light" (PBS Space Time, Oct 7, 2015)
www.youtube.com/watch?v=msVu...
#SpeedOfLight Is the bent rod that we see with part out and part in the water real? We see it broken, but when we take it out of the water it is totally straight. The same occurs with the Lorentz – FitzGerald contraction that follows from the Theory of Special Relativity.
August 6, 2025 at 2:40 PM
#SpeedOfLight Is the bent rod that we see with part out and part in the water real? We see it broken, but when we take it out of the water it is totally straight. The same occurs with the Lorentz – FitzGerald contraction that follows from the Theory of Special Relativity.
Space Travel at the Speed of Light: When Will It Become a Reality? #SpaceTravel #SpeedOfLight #InterstellarTravel #Science #Futurism
Space Travel at the Speed of Light: When Will It Become a Reality?
The idea of traveling at the speed of light has fascinated not only science fiction writers but also scientists for many years. Light travels at an astonishing speed of 299,792,458 meters per second. At this speed, you could circle the Earth more than…
root-nation.com
March 12, 2025 at 8:35 AM
Space Travel at the Speed of Light: When Will It Become a Reality? #SpaceTravel #SpeedOfLight #InterstellarTravel #Science #Futurism
Why is C the symbol for the speed of light? (2004) https://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/c.html (https://news.ycombinator.com/item?id=43472663)
Why is C the symbol for the speed of light? (2004)
math.ucr.edu
March 25, 2025 at 4:52 PM
Why is C the symbol for the speed of light? (2004) https://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/c.html (https://news.ycombinator.com/item?id=43472663)
#SpeedOfLight Einstein's first postulate of the special theory of relativity (STR) says that two observers with constant speeds obtain the same laws of Physics. That is, they are equivalent and cannot determine their own absolute speeds.
September 9, 2025 at 3:09 PM
#SpeedOfLight Einstein's first postulate of the special theory of relativity (STR) says that two observers with constant speeds obtain the same laws of Physics. That is, they are equivalent and cannot determine their own absolute speeds.
Thanks Fiber Broadband Association for the holiday card and stationery ☺️. Happy Holidays to you all! 🎄🕎
#FiberOptic #FTTH #FTTP #InternetForAll #FiberBroadbandAssociation #FusionSplicing #OTDR #SpeedOfLight #FiberSplicing #Internet #ConnectTheWorld
#FiberOptic #FTTH #FTTP #InternetForAll #FiberBroadbandAssociation #FusionSplicing #OTDR #SpeedOfLight #FiberSplicing #Internet #ConnectTheWorld
December 15, 2024 at 3:15 PM
Thanks Fiber Broadband Association for the holiday card and stationery ☺️. Happy Holidays to you all! 🎄🕎
#FiberOptic #FTTH #FTTP #InternetForAll #FiberBroadbandAssociation #FusionSplicing #OTDR #SpeedOfLight #FiberSplicing #Internet #ConnectTheWorld
#FiberOptic #FTTH #FTTP #InternetForAll #FiberBroadbandAssociation #FusionSplicing #OTDR #SpeedOfLight #FiberSplicing #Internet #ConnectTheWorld
#SpeedOfLight Since the speed of light is a constant, the concept of simultaneity depends on the reference frame (RF) in which we make the measurement. Events that are simultaneous in one certain RF may not be in another.
July 28, 2025 at 5:29 PM
#SpeedOfLight Since the speed of light is a constant, the concept of simultaneity depends on the reference frame (RF) in which we make the measurement. Events that are simultaneous in one certain RF may not be in another.