Quantum, Relativity & Forces Explained | Pixelated Physics
16 articles
Penrose Diagrams Explained: All of Spacetime on...
How do you draw the whole of space and time, out to infinity, on one sheet of paper? Roger Penrose found a way: shrink distances but keep every angle, so...
Penrose Diagrams Explained: All of Spacetime on...
How do you draw the whole of space and time, out to infinity, on one sheet of paper? Roger Penrose found a way: shrink distances but keep every angle, so...
Is Cosmological Redshift a Doppler Shift? Stret...
Light from distant galaxies arrives stretched to longer, redder wavelengths. Is that a Doppler shift from galaxies racing away, or space itself stretching the light? Here is the formula that...
Is Cosmological Redshift a Doppler Shift? Stret...
Light from distant galaxies arrives stretched to longer, redder wavelengths. Is that a Doppler shift from galaxies racing away, or space itself stretching the light? Here is the formula that...
The Hafele–Keating Experiment: Clocks Around th...
In October 1971 two scientists bought airline seats for four atomic clocks and flew them around the world, once eastward and once westward. When the clocks came home, they no...
The Hafele–Keating Experiment: Clocks Around th...
In October 1971 two scientists bought airline seats for four atomic clocks and flew them around the world, once eastward and once westward. When the clocks came home, they no...
How Do We Know Black Holes Exist if We Cannot S...
A black hole gives off no light of its own, so how can anyone claim to have found one? Through four independent lines of evidence: X-ray binaries like Cygnus X-1,...
How Do We Know Black Holes Exist if We Cannot S...
A black hole gives off no light of its own, so how can anyone claim to have found one? Through four independent lines of evidence: X-ray binaries like Cygnus X-1,...
How Big Is the Observable Universe if It Is 13....
Light has only had about 13.8 billion years to reach us, so why do cosmologists put the edge of the observable universe about 46 billion light-years away? The answer is...
How Big Is the Observable Universe if It Is 13....
Light has only had about 13.8 billion years to reach us, so why do cosmologists put the edge of the observable universe about 46 billion light-years away? The answer is...
What Is the Photon Sphere, and What Did the Eve...
Near a black hole there is a radius where gravity bends light into a circle: the photon sphere, at r = 3GM/c² for a non-spinning hole. It is unstable, so...
What Is the Photon Sphere, and What Did the Eve...
Near a black hole there is a radius where gravity bends light into a circle: the photon sphere, at r = 3GM/c² for a non-spinning hole. It is unstable, so...