I finally understand lack Simultaneity for different observers.

Newtonion math is simpler.

it is NOT surprising that until we got into “c” land we never knew about it – it has virtually NO meaning in the “earth” exercises at all 😉

it is NOT surprising that until we got into “c” land we never knew about it – it has virtually NO meaning in the “earth” exercises at all 😉

it is NOT surprising that until we got into “c” land we never knew about it – it has virtually NO meaning in the “earth” exercises at all 😉

where does he get the 2 from when calculating the distance L/2 (2:39 min)

Well, L is length of the compartment with presidents sitting on the extremes with light bulb kept in the middel of the compartment, light have to travel half the length of the compartment i.e, L/2 to reach the presidents.

mind blown

I’m feeling so thankful, that I’m getting to learn and understand things directly from Physicist Brian Greene. I saw you firstly on Discovery Channel and search about you on internet and Wikipedia. You along with your fellow Physicist like Brian Cox , Lawrence M. Krauss , Michio Kaku ,etc , you all are great personalities and the most important person on Earth since all of you are pro in Physics (the fundamental subject) you are always an idol to me , you are so Inspiring , and now I’m getting lectures from you, Omg its a dream Come true . Thank you so much sir for starting this program to reach everyone across the globe and giving us chance to directly learn things from you.. I can’t elaborate in words how blessed I’m feeling..🥲🥰 i want to become a Physicist too , to find the Ultimate truth and meaning but , due to lack of teacher here at my place, where people rarely go Deep into Concepts, i always wish i have a teacher who can teach what Scientist really mean to say when giving their laws.. and Now i found Your Videos..
Thank you so much sir❤️, Take Care Sir..

I’m feeling so thankful, that I’m getting to learn and understand things directly from Physicist Brian Greene. I saw you firstly on Discovery Channel and search about you on internet and Wikipedia. You along with your fellow Physicist like Brian Cox , Lawrence M. Krauss , Michio Kaku ,etc , you all are great personalities and the most important person on Earth since all of you are pro in Physics (the fundamental subject) you are always an idol to me , you are so Inspiring , and now I’m getting lectures from you, Omg its a dream Come true . Thank you so much sir for starting this program to reach everyone across the globe and giving us chance to directly learn things from you.. I can’t elaborate in words how blessed I’m feeling..🥲🥰 i want to become a Physicist too , to find the Ultimate truth and meaning but , due to lack of teacher here at my place, where people rarely go Deep into Concepts, i always wish i have a teacher who can teach what Scientist really mean to say when giving their laws.. and Now i found Your Videos..
Thank you so much sir❤️, Take Care Sir..

We can get a feel for the numbers without having to use a calculator. Say v is just 1 meter less than the speed of light so = c-1 (or 299792457 m/s). Here c is in m/s. The formula Lv / (c^2 – v^2) becomes L(c-1) / (c^2 – (c-1)^2) = L(c-1)/ (2c-1) = L/(2 + 1/(c-1) ). 1/(c-1) is very small so the time difference is very close to L/2. For a 10000m train this is very close to 5000 seconds which is about 83 minutes. The video states that this value (83 minutes) is gotten with 299792457.999999999 m/s. This is wrong. The calculation in the video was using c-1 or 299792457 m/s which is 99.999986% of the speed of light.

At 3:47 . CTb = L/2 + VTb . The time in CTb refers to the total time light took to reach PofForward . And CTb represents Total Distance light took.
L/2 refers to the actual distance from candle to PofForward . But As the Distance increases due to moving train . Say it moved M feets away from the moment light was emmited . And when light reached PofForward, PofForward is now M feets away from the point where light only had to travel L/2 to reach PofForward (if train is at rest) .
So why light took Tb amount of time to cover that extra distance.? Isn’t Tb is meant to represent the total amount of time light took to reach PofForward ? If CTb and VTb are different , why amount of time (Tb) is same ?