618 reputation
1519
bio website andrewpro.me
location
age
visits member for 3 years, 6 months
seen 8 hours ago

2d
revised Reference wave and wave travelling through a medium - refractive index
add proper tagh
2d
suggested approved edit on Reference wave and wave travelling through a medium - refractive index
Jul
1
revised Raychauduri equation for Milne universe
Improved formatting
Jul
1
suggested approved edit on Raychauduri equation for Milne universe
Jun
29
awarded  Yearling
Jun
29
comment Why do atomic clocks only use caesium?
@EmilioPisanty That's a nice question, but otherwise than "it's stable, it's ubiquitous, it's historical" I can't found any nice explanation on this.
Jun
29
revised Why do atomic clocks only use caesium?
fixed the incorrect caesium typing
Jun
29
suggested approved edit on Why do atomic clocks only use caesium?
Jun
29
answered Why do atomic clocks only use caesium?
Jun
22
comment Feynman Lectures: Why a non-reversible weight lifting machine cannot lift higher that a reversible one?
Just for reference link to a book for this chapter: Feynman Lectures.
Jun
22
revised Hamiltonian related to Riemann zeta function
improved formatting
Jun
22
suggested approved edit on Hamiltonian related to Riemann zeta function
Jun
1
accepted “Voyager: Lightning on Jupiter”: what's a sound source for this?
Apr
18
comment Which one is colder? Zero temperature ice or zero temperature water?
Also, are you talking about temperature in some energy sense?
Apr
7
comment 2s orbital wavefunction has non-zero probability at $r=0$?
Why not? Especially the marked answer is a clear explanation that the probability isn't just a wavefunction at zero. You forget the volume, which a proportianal to $r^2$, so multiplying by zero is zero. And notice that the plot you added thave $4\pi r^2 R^2_{nl}$, and not just a wavefunction.
Apr
7
comment 2s orbital wavefunction has non-zero probability at $r=0$?
possible duplicate of Hydrogen radial wave function infinity at r=0
Apr
5
revised What is the physical cause that circulation on a closed surface is zero?
fixed equation formatting
Apr
5
suggested approved edit on What is the physical cause that circulation on a closed surface is zero?
Apr
4
revised What is the significance of the “squared” in $E =mc^2$?
fix wrong latex code
Apr
4
comment What is the significance of the “squared” in $E =mc^2$?
You forget some }s.