Why Time "Stops" in a Black Hole

A lot of people are asking what the opening shot is supposed to be. Yea... it was my attempt to show that someone cannot occupy the same space as someone else but they both see the clock move the same way because their spacetime is essentially the same. I dunno... I needed some animation to go there while I talked lol.

The model used to demonstrate the “slowing” of light was like a revelation to me lmao

After many explanations about the "slowing down" of time near objects with gravity, this video finally did it in an extremely elegant way that truly made me understand. This is a masterpiece

You're the first to actually answer my, "What about an impossibly long rod?" question that stumped my lecturer when I asked about it. And you went into great detail, thanks!

that opening made me a man of culture

The side-by-side demonstrations of what is happening in 2D vs 3D is by far the best way I have ever seen this concept explained. Thank you so much for the amazing visuals!

Storage company ad after this video: “Are you having any issues with space?” Me: “You have no idea.”

Using the higher vs lower dimensional view of the Universe and how in one the photon appears to stop moving is one of the most brilliant visual representations of this I've ever seen.

Dude, this is easily the best demonstration of time dilation that I've ever seen. I have never understood how this would be possible, but I (at the very least) have somewhat of a grasp now. Thanks, man.

5:25 There is a reason, actually. People make this mistake because they associate the speed of light with.................well, light. When in fact it's the speed of causality. The value of this speed is arbitrary, but it must be finite. If it were infinite, all of the interactions in the universe would happen simultaneously, and time wouldn't exist. Think of the entire history of the universe until its end like a movie. The length of this movie is determined by how fast you play it. This is analogous to the speed of causality. The faster the speed, the shorter the movie. If the speed were infinite, it would no longer be a movie. It'd just be a photo. Time exists because there is a delay between something happening here and its effect being felt in another part of the universe i.e. effects cannot propagate instantaneously. This inability is what is manifested as the speed limit of causality. Light just happens to be one of the things that can travel at this speed. This is actually the essence of special relativity. I find it kind of sad that most people either don't understand this, or instead focus only on the math, without thinking about its implications, or origins.

"A black Hole is not a pleasant scenario" Underrated quote.

Very well explained. I also particularly like that you always emphasized the observer. As a kid I used to be really interested but absolutely confused with this stuff but you managed to explain it well without needing to use proper time ir the schwarzschild metric. Respect!

I've seen a lot of videos about black holes, I just clicked on yours because your username "but why" caught my attention. Im glad. You really gave me a new, different perspective on an explanation I've heard a lot of times before but never fully understood

Thank you for finally explaining this in an understandable way! I’ll probably be back here again in 6 months when I need to understand this concept again. 😂

This is probably the most intriguing thing about the quantum and physics world, things like how and why particles and basic forms of our world like time behave. I honestly am fascinated by things like black holes, they are so mysterious and the fact that we might never truly know what happens when you reach the event horizon is just such a scary yet beautiful feeling.

With regards to the two options with the rope, I think that what happens is the molecules become increasingly randomized until they are no longer predictable from the original path. You are applying a force to the rope, which adds mass and energy to the black hole causing it to expand. If you had an endless amount of material, you would see the black hole increase until it would eventually encapsulate yourself.

"Extremely Crazy-long Rod" was my nickname in high school. Subbed.

I’m very confused by the first video of a person stepping into another persons chair. I’m subbed. Edit: I was unaware of the step sibling trope comments this would spawn...

One thing to remember as well, is that in theoretical example of floating above the event horizon, the distances between atoms would stretched to maintain their positions within the fabric of spacetime (which is why the rod seems to be longer and longer from your perspective). So as a conscious being, the electrical impulses that make up our thought processes are actually traveling much greater distances and it takes longer for them to move between neurons. So as far as you are concerned time is moving normally be side you can only perceive time as fast as your neurons can transmit signals. In theory you could watch the entire history of the universe pass outside the black hole in a couple of minutes if spacetime is warped enough (and you didn't get Thanos'd by the warp ripping your atoms apart) because it takes the electricity THAT LONG to traverse the distances between your neurons.

For that thumbnail alone I gave you a like before the video started… this is my type of content. Keep up the good work!!