- #1
GTOM
- 955
- 64
How many experiment measured the vertical speed of light?
I wonder, how can gravity affect it?
I wonder, how can gravity affect it?
GTOM said:"One wouldn't seriously believe that the naval vessels "speed up" as they move away from the equator, approaching infinite speed at the poles, because they can move more degrees of longitude per hour."
That analogy still don't explain, why can't light come out, if it don't speed up or slow down...
If it is sucked in by a whirl, so it can't come out, it is speed may not change compared to the water, but change to an outside observer.
This paper presents an under-appreciated way to conceptualize stationary black holes, which we call the river model. The river model is mathematically sound, yet simple enough that the basic picture can be understood by non-experts. In the river model, space itself flows like a river through a flat background, while objects move through the river according to the rules of special relativity. In a spherical black hole, the river of space falls into the black hole at the Newtonian escape velocity, hitting the speed of light at the horizon. Inside the horizon, the river flows inward faster than light, carrying everything with it.
Note that the two light rays given by Y = 0, X = ±T (shown in fig. 14) lie completely
in our surface. The reader will immediately see that these light rays do not move along the
flanges at all (since they stay at Y = 0) and thus neither of these light rays actually move
away from the black hole. Instead, the light rays are trapped near the black hole forever.
It is also clear that these light rays divide our surface into four regions (I, II, III, and IV)
much as in figs. 4 and 6. Thus, an observer in region II of our spacetime cannot cross one
of these light rays without traveling faster than the speed of light. Observers in this region
are trapped inside the black hole.
The dynamic space notion is often used in connection with the Lense-Thirrring effect. Like here:pervect said:One thing I don't like about the river model is related to the central idea of space flowing. Any attempt to measure such a flow with instruments is doomed to failure according to special relativity, so it's a bit suspicious that the explanation involves a concept that's not measurable.
Whether free fall or spiral falling, the thought flow of space coincides with the behaviour of test particles. Said flow isn't measurable. But is the common expanding space interpretation of the cosmological redshift measurable?An international team of NASA and university researchers has dramatically improved the accuracy of the first direct evidence that the Earth drags space and time around itself as it rotates.
The vertical speed of light is the rate at which light travels in a vertical direction. It is a measure of how quickly light moves through a medium, such as air or water.
The vertical speed of light is the speed of light in a vertical direction, while the horizontal speed of light is the speed of light in a horizontal direction. This means that light may travel at different speeds depending on the direction it is traveling.
The vertical speed of light can be affected by the medium it is traveling through, such as air, water, or a vacuum. It can also be affected by the composition of the medium, as well as the temperature and pressure of the medium.
Yes, the vertical speed of light is always constant, regardless of the medium it is traveling through. This is one of the fundamental principles of physics known as the speed of light postulate.
The vertical speed of light can be measured using various methods, such as using lasers and mirrors to measure the time it takes light to travel a specific distance. It can also be calculated using mathematical equations that take into account the properties of the medium and the speed of light in a vacuum.