By Elcio Abdalla; et al
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Additional info for 2D-gravity in non-critical strings : discrete and continuum approaches
What Is Relativity? indb 29 3/15/2011 3:26:14 PM Er, How is this related to saying that the speed of light is constant? Hmmm. It's based on the following... Light moves at 300,000 km/s for a person at rest in the absolute stationary space. In other words, the speed of light was thought to be the constant value of precisely 299,792,458 m/s only when observed from absolute stationary space. light moves at 300,000 km/s. Light Observer at rest That's an important question. If light were to be observed from something moving through absolute stationary space, they thought the speed of light would appear to change.
Mr. A When the speed of light is constant: Mr. B observes the motion of the light from the space station. Since the light is moving at a constant speed, it will arrive first at the back of the ship and not arrive at the front of the ship for a long time. Sensor Rocket velocity Emits light The light arrived simultaneously at the front and back of the rocket! Mr. B on space station The light arrived at the back of the rocket first! Since it still hasn’t arrived at the front of the rocket, its arrival was not “simultaneous”!
I think I have heard about something like this... Earlier, I told you that we know from Maxwell's equations that light is an electromagnetic wave. But if it's a wave, some "medium" for transmitting it was thought to be required. A medium is the substance that transmits the waves. for example, the medium for sound is the air, and for ocean waves, it's seawater. Oh! Hawaii! Sound is transmitted with air as the medium Ocean waves are transmitted with seawater as the medium Aloha! Medium? indb 26 3/15/2011 3:26:11 PM Of course, Since there certainly is no air in space, sound is not transmitted, but...
2D-gravity in non-critical strings : discrete and continuum approaches by Elcio Abdalla; et al