All Things Physics
@allthingsphysics.bsky.social
Sharing the beauty of All Things Physics through detailed video explorations! Check it out at https://youtube.com/AllThingsPhysicsYouTube
Reposted by All Things Physics
Schlieren imaging really feels like magic. You do some fiddly adjustments with a lamp and a camera together right at the focus of a curved mirror, and suddenly the fiddliness becomes sensitive to tiny variations in the air density near the mirror itself.
The "oh, wow!" moment for me here was 1/🧪⚛️
The "oh, wow!" moment for me here was 1/🧪⚛️
Is it possible to see sound?
YouTube video by All Things Physics
www.youtube.com
November 22, 2025 at 9:42 PM
Schlieren imaging really feels like magic. You do some fiddly adjustments with a lamp and a camera together right at the focus of a curved mirror, and suddenly the fiddliness becomes sensitive to tiny variations in the air density near the mirror itself.
The "oh, wow!" moment for me here was 1/🧪⚛️
The "oh, wow!" moment for me here was 1/🧪⚛️
Have you ever wondered what sound looks like?
My latest video answers this question, and is now out on YouTube! Here's the official trailer, the link to the full video follows. If you like @veritasium.bsky.social, @3blue1brown.com, and @smartereveryday.bsky.social, you're going to love this!
My latest video answers this question, and is now out on YouTube! Here's the official trailer, the link to the full video follows. If you like @veritasium.bsky.social, @3blue1brown.com, and @smartereveryday.bsky.social, you're going to love this!
November 22, 2025 at 10:39 PM
Have you ever wondered what sound looks like?
My latest video answers this question, and is now out on YouTube! Here's the official trailer, the link to the full video follows. If you like @veritasium.bsky.social, @3blue1brown.com, and @smartereveryday.bsky.social, you're going to love this!
My latest video answers this question, and is now out on YouTube! Here's the official trailer, the link to the full video follows. If you like @veritasium.bsky.social, @3blue1brown.com, and @smartereveryday.bsky.social, you're going to love this!
I just uploaded my latest video and am waiting for the copyright claims to clear. It should be released in a day or so. In the meantime, here's one final teaser. Can you demonstrate a standing sound wave via a particle simulation? Not with true accuracy, but sort of...
November 21, 2025 at 3:45 PM
I just uploaded my latest video and am waiting for the copyright claims to clear. It should be released in a day or so. In the meantime, here's one final teaser. Can you demonstrate a standing sound wave via a particle simulation? Not with true accuracy, but sort of...
Have you ever seen air up close? Here is what it looks like at scale, when you zoom in (a lot) and slow things down (a lot). (Another teaser for my upcoming video.)
November 18, 2025 at 2:03 PM
Have you ever seen air up close? Here is what it looks like at scale, when you zoom in (a lot) and slow things down (a lot). (Another teaser for my upcoming video.)
I'm still trying to make the final edits to a new video. In the meantime, here's another teaser. Have you ever seen a million cubes? Check it out! (This scene took an incredibly long time to render.)
November 12, 2025 at 8:47 PM
I'm still trying to make the final edits to a new video. In the meantime, here's another teaser. Have you ever seen a million cubes? Check it out! (This scene took an incredibly long time to render.)
I'm almost finished with a new video, but it will probably take another week or so to polish it up. Until then, here's a teaser. How many grains of sand are in the Sahara desert?
November 6, 2025 at 9:11 PM
I'm almost finished with a new video, but it will probably take another week or so to polish it up. Until then, here's a teaser. How many grains of sand are in the Sahara desert?
Disappointed I won’t be at the winter meeting to see this. Congrats Rhett!
AAPT is pleased to announce that Rhett Allain has been selected to receive the 2026 Richtmyer Memorial Lecture Award. The award will be presented during the 2026 AAPT Winter Meeting. Read more at ow.ly/UpA350Xe7e6 #AAPTAwards #AAPTWM26
October 18, 2025 at 10:47 AM
Disappointed I won’t be at the winter meeting to see this. Congrats Rhett!
New video just released on the beauty of Taylor series! Made with manim_community and designed for #physics students. #iteachphysics
youtu.be/GINFaUB9zrc?...
youtu.be/GINFaUB9zrc?...
Taylor Series | Mathematical methods
YouTube video by All Things Physics
youtu.be
September 3, 2025 at 8:37 PM
New video just released on the beauty of Taylor series! Made with manim_community and designed for #physics students. #iteachphysics
youtu.be/GINFaUB9zrc?...
youtu.be/GINFaUB9zrc?...
I realize companies will occasionally need to update their terms of service, but this is somewhat shocking. Thankfully, I don’t use #WeTransfer.
An alert to all creatives using #WeTransfer. Basically, stop immediately! As of August, they will begin scraping everything you send for AI purposes (see the new paragraph in their Terms and Conditions below).
If, like me, you’re a voice artist, they’ll clone your voice. Avoid at all costs.
If, like me, you’re a voice artist, they’ll clone your voice. Avoid at all costs.
July 15, 2025 at 3:05 PM
I realize companies will occasionally need to update their terms of service, but this is somewhat shocking. Thankfully, I don’t use #WeTransfer.
I was recently visiting family in the Seattle area, and I had forgotten how beautiful this area is. Here’s a shot of Mt. Rainier as I left town.
June 10, 2025 at 4:34 PM
I was recently visiting family in the Seattle area, and I had forgotten how beautiful this area is. Here’s a shot of Mt. Rainier as I left town.
Over 15 years ago, we designed our house, and during the construction phase I personally ran co-ax, cat-6 lines, and speaker cables throughout the entire house before the walls went up. It was a fun project, and why not? One benefit was a whole-house audio system that we’ve enjoyed for years.
May 25, 2025 at 3:03 PM
Over 15 years ago, we designed our house, and during the construction phase I personally ran co-ax, cat-6 lines, and speaker cables throughout the entire house before the walls went up. It was a fun project, and why not? One benefit was a whole-house audio system that we’ve enjoyed for years.
If you've ever wondered about the depth of the hole that Mirabel Madrigal must traverse in the Disney movie Encanto, then wonder no more! Our article in the American Journal of Physics takes a non-standard approach to solving this introductory #physics problem (article link to follow).
March 21, 2025 at 3:05 PM
If you've ever wondered about the depth of the hole that Mirabel Madrigal must traverse in the Disney movie Encanto, then wonder no more! Our article in the American Journal of Physics takes a non-standard approach to solving this introductory #physics problem (article link to follow).
Well, it's taken a ton of work, but I've finally finished my latest video on schlieren imaging. Here's a short teaser, a link to the full video will appear in a follow-up message. Enjoy!
February 23, 2025 at 9:36 PM
Well, it's taken a ton of work, but I've finally finished my latest video on schlieren imaging. Here's a short teaser, a link to the full video will appear in a follow-up message. Enjoy!
I shot some amazing video this past summer, but have only recently found time to start putting together a video. It’s been a ton of work, but the results are looking really great. I probated another week or so to get it finished. Stay tuned!!
February 12, 2025 at 11:44 PM
I shot some amazing video this past summer, but have only recently found time to start putting together a video. It’s been a ton of work, but the results are looking really great. I probated another week or so to get it finished. Stay tuned!!
Here’s a cool example of refraction and Snel’s law. This pool has the same depth throughout, but it looks shallower on the far end! Here are two pictures taken from opposite ends of the pool.
January 1, 2025 at 6:42 AM
Here’s a cool example of refraction and Snel’s law. This pool has the same depth throughout, but it looks shallower on the far end! Here are two pictures taken from opposite ends of the pool.
In intro physics the other day, we determined that the acceleration of an object rolling down a ramp is independent the object’s mass and radius. In other words, all disks (or spheres) will have the exact same acceleration. Let’s see if that’s true.
December 6, 2024 at 3:05 PM
In intro physics the other day, we determined that the acceleration of an object rolling down a ramp is independent the object’s mass and radius. In other words, all disks (or spheres) will have the exact same acceleration. Let’s see if that’s true.
What did we do in physics class today? An analysis and an experiment:
November 20, 2024 at 9:36 PM
What did we do in physics class today? An analysis and an experiment:
At long last, the entire set is in print and available!! If you teach introductory physics and are looking for a student-centered curriculum that includes tons of hands-on activities, here is a PER-informed option!
November 6, 2024 at 6:38 PM
At long last, the entire set is in print and available!! If you teach introductory physics and are looking for a student-centered curriculum that includes tons of hands-on activities, here is a PER-informed option!
Well that felt good! Who’s next?
November 5, 2024 at 12:39 PM
Well that felt good! Who’s next?
First time I got to see the northern lights, and it didn’t disappoint!
October 11, 2024 at 12:40 AM
First time I got to see the northern lights, and it didn’t disappoint!
Today's class: Simultaneously measure force and acceleration while pushing and pulling on a (nearly frictionless) cart. The slope (inertial mass) turns out to be equal to the measured (gravitational) mass. How cool is that?
October 2, 2024 at 9:10 PM
Today's class: Simultaneously measure force and acceleration while pushing and pulling on a (nearly frictionless) cart. The slope (inertial mass) turns out to be equal to the measured (gravitational) mass. How cool is that?
Relativity experiments are way too hard for undergraduates. Really? Try this one (it's freely available for a limited time as an editor's pick)!
doi.org/10.1119/5.02...
doi.org/10.1119/5.02...
A simplified relativity experiment
We describe a simplified experiment that can be used to verify the relativistic energy-momentum relationship for beta particles emitted from a 204Tl source. The
doi.org
September 30, 2024 at 10:41 PM
Relativity experiments are way too hard for undergraduates. Really? Try this one (it's freely available for a limited time as an editor's pick)!
doi.org/10.1119/5.02...
doi.org/10.1119/5.02...
New semester, and a new edition of the Workshop Physics Activity Guide! Should be a fun semester!
September 2, 2024 at 5:25 PM
New semester, and a new edition of the Workshop Physics Activity Guide! Should be a fun semester!
The Basics of Circular Motion (and Beyond)!
YouTube video by All Things Physics
youtu.be
August 19, 2024 at 5:27 PM
This blog post is amazing! Incredible interactive simulations!
February 27, 2024 at 8:02 PM
This blog post is amazing! Incredible interactive simulations!