Tag: Physics
Why We Might Be Alone in the Universe
How Many Universes Are There?
The universe is big, but it’s peanuts compared to the eternally inflating multiverse. But just how many universes are there? What are they like? And most importantly, what can they tell us about … aliens?
Higher dimensions get really weird…
This video covers a range of what shapes and properties you’d encounter in higher dimensions.
Modern Physics with Numerical Methods
This is an open-source, modern physics textbook typically for the third semester students majoring in engineering, physics or chemistry. An emphasis is placed on fundamental principles as well as numerical solutions to equations where no analytical solutions exist. The content begins with optics and uses that as a stepping stone to wave phenomena and quantum systems.
How to Detect Extra Dimensions
On this Space Time Journal Club we look at how gravitational waves can be used to search for extra dimensions of space!
Why String Theory is Wrong
There’s this idea that beauty is a powerful guide to truth in the mathematics of physical theory. String theory is certainly beautiful in the eyes of many physicists. Beautiful enough to pursue even if it’s wrong?
Why String Theory is Right
Some see string theory as the one great hope for a theory of everything – that it will unite quantum mechanics and gravity and so unify all of physics into one glorious theory.
What are the Strings in String Theory?
So surely there exists a deeper set of cogs and wheels – a theory that brings all observable phenomena into the same mechanical framework. That would be a theory of everything, and this is the great hope of string theory.
Scientific method: Defend the Integrity of Physics
Attempts to exempt speculative theories of the Universe from experimental verification undermine science, argue George Ellis and Joe Silk.
The Geometry of Causality
In this episode we dive deeper into the relationship between space and time and explore how we can geometrically map the causality of the universe and increase our understanding of how time and distance relate to one another.
Reversing Entropy with Maxwell’s Demon
Ultimately, entropy is a measure of the availability of free energy – of energy that isn’t hopelessly mixed in thermal equilibrium. Pump energy into a small system and complexity can thrive..
The Physics of Life
So can we approach the question of the origin and the very nature of life from the point of view of physics? We’re sure going to try.
The Real Meaning of E=mc²
You’ve probably known OF E=mc² since you were born, and were also probably told that it meant that it proved Mass equaled Energy, or something along those lines. BUT WAIT. Was E=mc² explained to you properly? Mass equalling energy is mostly true, but E=mc² actually describes a much more interesting, and frankly mind-blowing aspect of reality that likely wasn’t covered in your high school physics class.
When Time Breaks Down
But how does motion affect time? Let’s dive deeper into the true nature of matter and mass by exploring Einstein’s photon clock thought experiment, and the phenomenon that is time dilation.