A Beginner's Guide to the Fourth Dimension

Math can be weird sometimes, usually when it goes against some of our most common knowledge, yet still can make sense. This is one of those times.

[elijahthompson]

Imagine 4d creatures using 3 dimensional screens to convey theories on 5 dimensions

[col]

fun fact:
If you watch all of the dimension videos on Youtube, you become crazy and still don't get it.

[SyriusStarMultimedia]

I love it when the smart people talk to the rest of us like we are people.

[effyiew]

I've watched many videos trying to understand 4D and this one has gotten me the closest. Well done.

[asingularcheesepuff]

Here's fuel for thought: as 3D beings, we can fully perceive anything and everything on a 2D plane (as demonstrated by the circle-in-the-box scenario), however due to the lack of the third dimention, a (theoretical) 2D person would find it impossible to look "up" and see us, as we simply exist above their dimension.

Taking this one step further - if a 4D person was to look at a 3D plane, they too would be able to perceive everything at once - you, the house you're in, the plumbing of the house, your organs digesting your last meal... anything. And the scary part is, as we exist on a 3D plane, we would be completely unable to look "out" to see these 4D people. They could exist, and be watching you read this, right now, but you wouldn't be able to tell. ;)

[CyberQuickYT]

to make 4d just add water, some shaking and air.

(Cinemas would agree)

[destroyishere]

It's interesting because we can't see 4D objects because we live in a 3D universe, however, hypothetically speaking, we could see the 3D shadows of 4D objects if we found some.

[caramocha]

Not sure if I completely understand the fourth dimension yet but I feel like this video has gotten me closer to it. Thank you.

[perison]

"You can see all sides of the box and the sphere inside. Now doesn't that freak you out?"
Glass boxes: *am I a joke to you*

[monsieur.Chipmunk]

Imagine the horror Mario felt, being controlled by someone to smash objects with his heads, and can only see lines along his way, the horror is giving me anxiety.

[livsmitty]

The 3D image of the moving tesserac really helped me understand things a lot better. It's like life blooms around you. You can open 3d objects up and around and back into themselves. Think flipping a doughnut inside out and back again.

[mobamba]

is there a beginners guide for this beginners guide this shit too confusing for me

[prestonh]

You're explaining 4D to me
In my 3D world
On my 2D screen
And I'm trying to understand with my 1D brain... and this comment is original in 0 dimensions.

[yoyoschmo]

This was by far the best explanation I’ve seen. So good that I scoured the internet to find it again. Now if you can just get me to understand 11 dimensions

[lordfinn]

Now watch what happens when it starts spinning

Me:it's not already spinning

[wither]

i always imagined 4d as being able to perceive things from all directions at once in and out, if that makes sense.

[mlowe]

"I know what some people are thinking, couldn't you consider time a dimension?"

No, my dumb ass was not thinking that at all.

[reginaldthunderfuck]

I read a book called Hyperspace by Michio Kaku once. There was a passage where someone proposed thinking of a cube, unfolding it into a 2d series of squares, making the squares into cubes and then refolding them into a cube as a means of picturing a hypercube.

Also, I may be misinformed but I thought spacetime was a dimension.

[ssophiax]

I've been watching a lot of these videos where ppl explain the 4th dimension and in every single one the top comment always is "You're explaining a 4D in 2D to my 1D brain" lmao everyone thinking they original

[pikakirbyyy]

"Here's where things get tricky."

me who didnt understand most of the stuff he talked about beforehand: *_IT WAS ALREADY TRICKY_*