- #1
starstruck_
- 185
- 8
I decided to read up on the chapters we didn’t cover in first year Physics from my textbook, and decided to start with general relativity since it was in the same section of the textbook as the last topic we covered (that topic was physical optics - not lenses- photons and the double slit experiment and so on).
I 100% do not understand the whole speed of light light portion of it// why all observers observe it at the same speed.
From previous knowledge, I know that the velocities we have dealt with were relative to something. If we were moving within our frame of reference then the velocities would change accordingly.
Light doesn’t follow that. No matter whether the observer is moving or not, the speed of light remains constant in a constant medium.
So does that mean that the speed of light is relative to the medium it is traveling through and not to objects traveling to or away from a source of light? ((I think I’m understanding this wrong))
Also does it have anything to do with the amount of medium between the object and the light source.
If the speed of light depends on the medium it is traveling through, then only a certain number of photons could exist within a given volume of the medium at a certain time, right? Or is that wrong?
If a car is moving toward the light source, then the amount of medium between the light source and car is reduced but so is the number of photons there so the light that is still approaching the car would be approaching it at a constant speed?
I don’t really know what I’m talking about, I’m just trying to make sense of this. I watched a video on it that seemed helpful but I’m a little slow so it hasn’t made any sense.
If someone could explain this from scratch (sorry if it’s asking for a lot) that would be extremely helpful!
I 100% do not understand the whole speed of light light portion of it// why all observers observe it at the same speed.
From previous knowledge, I know that the velocities we have dealt with were relative to something. If we were moving within our frame of reference then the velocities would change accordingly.
Light doesn’t follow that. No matter whether the observer is moving or not, the speed of light remains constant in a constant medium.
So does that mean that the speed of light is relative to the medium it is traveling through and not to objects traveling to or away from a source of light? ((I think I’m understanding this wrong))
Also does it have anything to do with the amount of medium between the object and the light source.
If the speed of light depends on the medium it is traveling through, then only a certain number of photons could exist within a given volume of the medium at a certain time, right? Or is that wrong?
If a car is moving toward the light source, then the amount of medium between the light source and car is reduced but so is the number of photons there so the light that is still approaching the car would be approaching it at a constant speed?
I don’t really know what I’m talking about, I’m just trying to make sense of this. I watched a video on it that seemed helpful but I’m a little slow so it hasn’t made any sense.
If someone could explain this from scratch (sorry if it’s asking for a lot) that would be extremely helpful!
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