ratfan.on.computer
Physics, biomedicine, computer science guitar+violin jazz folk classical pop
Jewish anti-Zionist for a free Palestine and the dissolution of the Israeli state
they/them oder keine Pronomen
592 posts
166 followers
102 following
Regular Contributor
Active Commenter
comment in response to
post
Well particles experiencing an electromagnetic force are therefore in a way 'detecting' them.
I don't know why they have that name but lots of physics stuff is named by physicists who are nerds
comment in response to
post
Loosely put, it is a photon responsible for the presence of the electromagnetic force; electrons exchanging virtual photons is the repelling force between them. They only exist inside these force mediating roles, can't be detected by us, can also be thought of as 'just' a mathematical invention 🧪
comment in response to
post
Ugh and now I have to raise my hand on top of it all
comment in response to
post
🧪
comment in response to
post
Your creations are so full of life ❤️
comment in response to
post
Wow, handsome chap
comment in response to
post
Oh shit this goes hard
comment in response to
post
Was this written by a 5 year old
comment in response to
post
Lol read this as secret resin
comment in response to
post
Exactly :) Perhaps I'll post the spacetime diagram later where it becomes visually clear, but essentially to the runner the rear door opens before the front door shuts, so to him he was never enclosed in the barn
comment in response to
post
Here different frames correspond to travelling at a velocity relative to a stationary frame. You can see at the bottom of the graph values of speed are given as fractions of the speed of light c. This is special relativity, a 'special' case of general relativity where we ignore gravity
comment in response to
post
I didn't add an alt text because it never works for videos on bsky. The spacetime diagram in the video is a 2d axis where position in space is the X axis and position in time is the y axis. The angle between the axes is shown shifting from 90 to smaller angles, a transformation of inertial frames
comment in response to
post
Is it though
comment in response to
post
Idk why alt text doesn't work on videos here but the video is described in the post and the graphic is from: Lucas Vieira Barbosa authored the original OGV. Selected frames (10% of the original) extracted and re-timed by Stigmatella aurantiaca, CC BY-SA 4.0 Wikimedia Commons
comment in response to
post
It still not perfect but now we see earth enmeshed in a 3D grid, at each vertex on the mesh there is an imaginary clock keeping time. Notice how near earth, the presence of mass causes the clocks to run slower and the space to bend. Objects are 'spread' across 'time zones'. 🧪
comment in response to
post
What who blocked me
comment in response to
post
When I embezzle funds I always make sure to use a silly pseudonym so we can all have a smile in court
comment in response to
post
Or bias, or inclusion...the concept of an entity having the property of including another entity is famously woke
comment in response to
post
Incidentally one of my favourite theoretical physicists Leonard Susskind was a plumber before physics
comment in response to
post
The way this connects quantum mechanics and gravity is precisely what makes it a compelling theory! Something's missing indeed
comment in response to
post
A regular thermometer is just a helpful image here but let's say that even if you compensated for compressed mercury there would be an additional rise not due to compression
comment in response to
post
It's also my understanding that to an inertial observer these quantum fluctuations would be experienced as virtual particles, i.e. they would have no effect. But add acceleration (like from the gravity of a black hole) and the fluctuations become thermal 🔥🧪