Why does E=MC²?

Let's find out.

[FatherManus]

Because Albert E is as dope as two rappers.

[mariogranados]

I used to be confused about this equation, but now that I have watched this video, I am even more confused 😅. Thanks!!

[algolin]

There is actually a reason why momentum is conserved. It's called Noether's theorem, which says, that for every symmetry of a system there is a quantity that is conserved. Momentum conservation corresponds to translational invariance.

[KuldeepChauhan]

This is profound. The way you have explained 4 variables (Including Ct) with a 3 axis graph is amazing . I have been watching Space Time explanations for a while now and I find this really intriguing. Thank You Sir !

[lucassdd]

I'll need to watch this a few more times to fully get it, but understanding that we're all moving in spacetime at c really clicked for me from this video. Thanks!

[todddaniels]

"No one knows why momentum is conserved" ... Emmy Noether enters the chat.

[robertspeedwagon]

I love how the visuals in this video are so weird for no reason it's amazing

[anywallsocket]

FINALLY. Countless times I've seen people explain it as if they've done so completely, either by dimensional analysis (simply calling c^2 a "conversion factor"), or some other hand-wavy way. At some point everyone just seems to say "that's sufficient for me!", but I have been unable to alleviate the itch that the first c is our motion through spacetime, and the second c is the real conversion of matter into energy -- for what is mass but locked up energy, and what is this energy in its purest form if not light?! Thank you <3

[rogumann]

You just blew my mind, I have always known and accepted from relativity that time seems to tick slower the faster you go (time and speed relative to something else), but I have never once heard that its because we move through spacetime at C. In general I would have to agree that this video is a bit more harder to follow compared to your other videos, but those other videos are amazing!

[victorgrazziani]

My guy, I absolutely LOVE your channel. Your didatics are above what one would expect from a free youtube video and I wish I could donate to show my deep admiration for your work.
I'm a insatiable curious person and you help me keep the learning ball rolling so effortlesly by teaching with those funny animations, you've helped me understand so many complex topics that I had seen before but didn't fully grasped the concept until I saw the way you break down each pice of information. It helps me contextualize and fit everything togheter in my mind's puzzle about how the universe do it's thing and feeds the flames of my imagination.
I don't usually comment on videos but you deserve it, thank you so much! Hope the very best for you and everyone out there sharing knowledge for free. (Sorry for grammar mistakes, self english learner)

[felixpeltier]

wow! this is the first time ive been able to understand the concept of relativistic mass. I've always heard the dumbed down explanation of "at high speeds, objects gain mass" and i thought that the energy of the object was being directly transformed into massive particles. Thanks for this video, guys. def my favorite one yet!

[coobit]

You have given me a gift of understanding some of the logic behind the spacetime construction. Thanks.

[Sir_Uncle_Ned]

A lot was slotted into place with this one! I now know the mechanics behind time dilation! As movement through space approaches c, the movement through time slows down to compensate!

Well, that’s my mind blown. Welcome to the “Ned’s mind blowers” playlist!

[qwfp]

I feel like this video was harder to follow, compared to your previous videos. Why do we move at constant speed through space time? Why does adding time dimension suddenly makes velocities not relative?

[TheFinagle]

On a side note this is also where time dilation from motion comes from. (you brush on that with the fission reaction example) Your 4D speed is locked at c - always, so if your moving rapidly through spacial axis of the 4D spacetime there is "less room'" in that c value for movement through the temporal axis. (Technically ANY slight motion would come with the tiniest amount of time dilation, its just negligible until you reach reasonable fractions of the speed of light)

[Ikbeneengeit]

We kinda DO know why momentum is conserved, it can be derived from the fact that the universe has translational symmetry. Emily Noether proved it.

[muumia]

Keep up the good work! Loved the twilight reference at 0:34

[TheVenerableMrKrieg]

Hearing your words over 1:45, it finally clicked why I never got it until now. E = M to the assless power times C squared. My attention span has always just given out once it realised the mass was assless and realising that was all it took to power through!

[gimmedaloot]

This has been a thorn in my side for 20 years.. never had the time to investigate it through all my physics courses at the university. Dynamics, statics, thermal etc…no explanation was ever attempted. It was just a fact, a baseline to move from. Thank you. That itch has finally been scratched and I can die in peace…🤣😇😎

[OslerWannabe]

BRILLIANT! In the 55 years since i first studied all this, I've never heard this particular facet explained so clearly. Subscribed, and I'll be back..