- #1
Adam Rifai
- 15
- 0
Since light bend in gravitational fields in line with the general relativity , does the speed of light slows down? or is it always constant and never change?
Light does not change speed in a vacuum, it just follows the local geodesic, which makes it look bent in terms of Euclidean geometry. A geodesic is a straight line in space-time (Riemann geometry).Adam Rifai said:Since light bend in gravitational fields in line with the general relativity , does the speed of light slows down? or is it always constant and never change?
Adam Rifai said:Since light bend in gravitational fields in line with the general relativity , does the speed of light slows down? or is it always constant and never change?
As i understood, that will not affect the fixed speed of light, i wonder what kind of engergy drives light to maintain it's speed?Jonathan Scott said:the speed of light relative to the coordinate system at a lower potential is effectively slightly slower than it is at a higher potential.
Why would it need any energy to maintain speed? What would slow it down?Adam Rifai said:As i understood, that will not affect the fixed speed of light, i wonder what kind of engergy drives light to maintain it's speed?
Adam Rifai said:it baffled me
Adam Rifai said:Since light is a form of energy, and can be measured in energy units (joules, or quanta), therefore what cause , feed, create or drive that energy to maintain a fixed and constant speed, it baffled me
Drakkith said:While light may not lose speed coming out of a gravity well, does it have a longer path to take than it would otherwise?
Drakkith said:While light may not lose speed coming out of a gravity well, does it have a longer path to take than it would otherwise?
Adam Rifai said:View attachment 76766
This Quote addresses the heart of my question,
Fig 1 is a straight path of light
Fig 2 is a path of light that is bent by Gravity
the question is will both rays of light reaches from (a) to (b) at the same time?
The speed of light, denoted by the symbol c, is a constant in physics that represents the maximum speed at which all matter and information in the universe can travel. In a vacuum, the speed of light is approximately 299,792,458 meters per second.
According to Einstein's theory of general relativity, the speed of light remains constant in a vacuum, regardless of the presence of a gravity field. However, the path of light can be curved by the gravitational force of massive objects, giving the illusion that the speed of light has slowed down.
Gravity does not directly affect the speed of light, but it can affect the path that light takes. In a strong gravitational field, such as near a black hole, the path of light can be bent, creating the appearance of a slower speed. However, the speed of light itself remains constant.
According to our current understanding of physics, the speed of light is the ultimate speed limit in the universe. It is impossible for any object or information to travel faster than the speed of light. However, scientists continue to explore theories, such as wormholes and warp drives, that could potentially allow for faster-than-light travel.
The speed of light is typically measured by sending a beam of light through a vacuum and measuring the time it takes to travel a known distance. This method, known as the "time-of-flight" method, has been refined over the years and can now measure the speed of light with incredible precision.