Spacetime Diagrams | Special Relativity Ch. 2

This video is chapter 2 in my series on special relativity, and it covers spacetime diagrams, rotational and translational symmetry of both time and space, how certain transformations preserve distances (measured in terms of a reference like a meter or second), and so on. We'll wait until the next video to talk about Lorentz transformations, relativity of velocity, minkowski diagrams, and the speed of light.

MinutePhysics is on twitter - @minutephysics

Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Created by Henry Reich

[bluebrown]

Fantastic! The animations were really well done and really helped to clarify the content matter. Looking forward to chapter 3.

[cphVlwYa]

Guys, I know it's early in the series. But if you're worried about this video not being 1 minute long I think you'll find that you simply aren't moving at the right speed relative to your screen ;)

[AceNallawar]

Fourteen MinutePhysics is always Welcome

[spaciousflame]

"my son is 18."
"really, does he have a driver's license?"
"wait...18-month-olds can drive now?

[sado]

3b1b really did inspire you, love it.

[NBFman]

Why are so many of the comments about how long the video was and so few mentioning how awesome the animations in this video are? Thank you for your outstanding work, Henry.

[MatthewWeiler]

I would ask what you did to that cat to make it run away from you at 1m/s.

[calyodelphi]

Dood, Henry, you've *really* stepped up your illustration and animation game since you first started doing these Minute Physics videos. That pseudo-3D orbit worldline animation was stunning. <3

[rudrasingh]

Not understanding space-time diagrams, leads most people to not understand relativity and thus they give up. This is one of the easiest explanation I have seen. Amazing work Henry!

[Ryukachoo]

I've always wondered about Henry's obsession with cats as examples.
How many cats have been lost to abstract space, Henry?

[SogMosee]

This video is INSANELY well made. I feel I am really starting to understand what special relativity is about. Can't wait until the next video!

[allamericandude]

Guys, just think of this as 14 one-minute videos strung together.

[greninjash]

5:58 should have been
x_new = x*cos(θ) + y*sin(θ)
y_new = y*cos(θ) - x*sin(θ)

But anyway great video ! Waiting for the next chapters

[JonSebastianF]

_"Say, we have a cat attached to a spring, "_ ...MUHAHAAAH :P

[DeFlekkie]

As a physics teacher that has to explain special relativity each year to my students, I really look forward to how you are going to this story.
I wonder what my overall feeling in the end will be, I might completely remake the part of my course that on special relativity.

Thanks so much!

[EEVblog]

I was expected that gorgeous hardware rig you showed off last time! :-(

[nathancampioni]

at 5:57 there is an error in the rotation matrix, the signs should be inverted the minus should be a plus and viceversa. This is because we are not rotating the point itself but the point of view.

[Bonnie-wkze]

I’m just 13 years old and haven’t even touched stuff like ‘cos and ‘sin’ but still u explain it in such a way that even I can understand.i had alway had a Interest for maths and physics but the way teachers teach us at school is too confusing. So while the teacher keeps reading from the book (and not understanding the topic him/herself) we are just left confused and if we ask a question, the teacher gives such a answer that we still don’t understand.Thank you for covering this topic and Thank YOU for making very enjoyable and interesting videos

[SciencewithKatie]

Best notification I’ve gotten all day 🙌🏼 I love these videos so much! 🤓

[Kraigon]

Oh my god this was amazing. I got into your channel probably around a decade ago with your videos on Schrödinger's Cat and other things, but I have become kind of nonplussed at many of youtube's offerings as of late with simplified videos not covering complex topics enough because they have to fit inside of a scant few minutes. I lived all 14-and-change minutes of this because it wasn't just blowing through everything, you actually took the time to explain what all was being considered. Thank you so much for bringing us this and I hope for some more longer-form videos like this in the future.