Excellent. Just what I was looking for. A simple refresher of the situation, avoiding matrices or equations. Just animation and explanatory graph. (Now I can return to the thing I was reading, that assumed I was still au fait with this bit ;-) ) Works for most real world situations; I don't find myself travelling at near light speeds too often :-)
It is often said relativistic effects are not important (or don't occur) unless speeds are appreciable with respect to c. I disagree. Moving electric charge, for example, is very sensitive to Lorentz contraction. Typical speeds may be on the order of 0.1 m/s yet, without it, a current would not be able to set up a magnetic field.
What about a point on a rotation, in both reference frames, a mass on a rotation translating at a constant of one reference frame, the observers see Outside: Changing acceleration of point / mass along x In: will see no acceleration along of mass x In both cases you see acceleration the same just due to rotation. then add the constant rate of translation. Calculations change But you have no change for a mass
*The universe is fascinating. I believe there must be an advanced civilization somewhere out there in the Universe that has the privilege of traveling through outer space using their spacecrafts and watching in awe the wonders of the Universe.*
Not a criticism at all but I would benefit more if it was briefly mentioned v < v' + vb instead of v = v' + vb because, if this (very) tiny discrepancy is not side-noted upfront then it snowballs later when I deal with Lorentz transformations. The whole point to keep in mind is that, although Galilean transformations are close approximations under scenarios outlined in this lesson, they're not approximations in ALL cases. Sometimes they are exact, and one needs to know which transformation to apply in which situation. Have seen relativity professors come to grief ignoring this distinction.
The man on train moves at 2.8 metres, ie the speed of the train. Doesn't matter what his own movements are, you can't add together an absolute speed of 2.8 and a relative speed of 0.6.
5:44 hell how can something ever travel faster than the speed of light😲😰😰😨😧 I don't believe this. This is totally wrong! if this was right you'd totally changed the theory of relativity😵
Now suppose the person on the wagon fires a gun ( bullet). Nothing different to light. The man himself is transported, his ball he kicked is but not things flying freely through the air. Regardless if you fire from a train or at rest , the bullets v has nothing to do with the wagon and its speed. Same for light of course. But physicists like to argue that your bullet will be faster if you fire your gun while running rather than standing still. I will never buy that, it’s utter nonsense and therefore there is nothing special with light. It’s the light myth since Michelson-Morley.
That scenario would be true for the person shooting the bullet i.e from ground or in the moving train But it would be different for another person who is standing outside the train i.e bullet before the firing would have a velocity which the train have if we observe it outside the train.... And thus after firing, the train velocity of bullet(as seen by outside person) would add up with the firing(burst) velocity of bullet And thus the observer outside the train would perceive different velocity than the person firing the bullet inside the train cause he have the same velocity as the bullet does(both are stationary to each other).
It's similar to throwing a stone from a moving train..... It would hit hard to a target if thrown from the moving train!!, rather than throwing it normally stationary to the target (outside the train) as it have more velocity due to the train's speed
Excellent. Just what I was looking for. A simple refresher of the situation, avoiding matrices or equations. Just animation and explanatory graph. (Now I can return to the thing I was reading, that assumed I was still au fait with this bit ;-) ) Works for most real world situations; I don't find myself travelling at near light speeds too often :-)
It is often said relativistic effects are not important (or don't occur) unless speeds are appreciable with respect to c. I disagree. Moving electric charge, for example, is very sensitive to Lorentz contraction. Typical speeds may be on the order of 0.1 m/s yet, without it, a current would not be able to set up a magnetic field.
This is the best video about Galilean transformation thank you, sir!
Whoever made it here from watching StarTalk, this is your button
Same 😂
What about a point on a rotation, in both reference frames, a mass on a rotation translating at a constant of one reference frame, the observers see
Outside: Changing acceleration of point / mass along x
In: will see no acceleration along of mass x
In both cases you see acceleration the same just due to rotation. then add the constant rate of translation.
Calculations change
But you have no change for a mass
*The universe is fascinating. I believe there must be an advanced civilization somewhere out there in the Universe that has the privilege of traveling through outer space using their spacecrafts and watching in awe the wonders of the Universe.*
Take love from 🇧🇩 (Bangladesh)
Very good example
Not a criticism at all but I would benefit more if it was briefly mentioned v < v' + vb instead of v = v' + vb because, if this (very) tiny discrepancy is not side-noted upfront then it snowballs later when I deal with Lorentz transformations.
The whole point to keep in mind is that, although Galilean transformations are close approximations under scenarios outlined in this lesson, they're not approximations in ALL cases. Sometimes they are exact, and one needs to know which transformation to apply in which situation. Have seen relativity professors come to grief ignoring this distinction.
Excellent video. Thank you so much sir!
Thanks a lot sir.
Very good illustration.
Thanks for spreading knowledge 😊
Good, good. Sound explanation.
nice simple explanation, thanks.
thanks its loud and clear !
Amazing👌💖
Thank you so much 🙌🏻
Great work😘😘😘
So this was the Galilean coordinate was it?
Perfect
nice work!
The man on train moves at 2.8 metres, ie the speed of the train. Doesn't matter what his own movements are, you can't add together an absolute speed of 2.8 and a relative speed of 0.6.
There is no such thing as 'absolute' speed. It is all relative. Clearly you must add the two together to get what the person on the ground sees.
Nice
5:44 hell how can something ever travel faster than the speed of light😲😰😰😨😧 I don't believe this. This is totally wrong! if this was right you'd totally changed the theory of relativity😵
I am showing why the Galilean Transformations don't work.
David Butler oh!😅 sry!❤️
help me
Now suppose the person on the wagon fires a gun ( bullet). Nothing different to light. The man himself is transported, his ball he kicked is but not things flying freely through the air. Regardless if you fire from a train or at rest , the bullets v has nothing to do with the wagon and its speed. Same for light of course. But physicists like to argue that your bullet will be faster if you fire your gun while running rather than standing still. I will never buy that, it’s utter nonsense and therefore there is nothing special with light. It’s the light myth since Michelson-Morley.
That scenario would be true for the person shooting the bullet i.e from ground or in the moving train
But it would be different for another person who is standing outside the train i.e bullet before the firing would have a velocity which the train have if we observe it outside the train....
And thus after firing, the train velocity of bullet(as seen by outside person) would add up with the firing(burst) velocity of bullet
And thus the observer outside the train would perceive different velocity than the person firing the bullet inside the train cause he have the same velocity as the bullet does(both are stationary to each other).
It's similar to throwing a stone from a moving train.....
It would hit hard to a target if thrown from the moving train!!, rather than throwing it normally stationary to the target (outside the train) as it have more velocity due to the train's speed