User KF Gauss

81 votes

How do I experimentally measure the surface area of a rock?

answered Nov 10, 2019 at 19:07

21 votes

Accepted

Why no proton microscopes? Proton diffraction; or proton scattering experiments? Proton crystallography?

answered Aug 23, 2020 at 6:40

19 votes

Reverse of diffraction

answered Jun 23, 2019 at 22:04

15 votes

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Limit on how many photons can hit a surface

answered Dec 25, 2022 at 5:09

15 votes

Accepted

Why do we even need RF cavities to accelerate particles?

answered Jul 23, 2022 at 8:45

9 votes

What is the minimum number of metal atoms necessary to make a mirror?

answered May 9, 2019 at 10:48

9 votes

Accepted

What colour is an electron?

answered Feb 25, 2019 at 5:08

9 votes

Why aren't particles constantly "measured" by the whole universe?

answered Feb 15, 2019 at 9:24

8 votes

Accepted

Why does a transition between 2 $s$-orbitals work for cesium's clock transition?

answered Jan 30 at 2:15

8 votes

Why are magnetic monopoles "incompatible" with quantum mechanics?

answered Apr 25, 2022 at 6:19

8 votes

Do superconducting materials have "zero" work function?

answered Sep 15 at 10:15

7 votes

Do hadrons have color moments?

answered Jan 26, 2021 at 3:37

7 votes

The difference between optical phonons and acoustic phonons in terms of energy absorption

answered Apr 8, 2019 at 16:57

6 votes

Why can't the density difference between the liquid and solid be an appropriate order parameter for liquid-to-solid transition?

answered Jul 29, 2017 at 5:11

6 votes

Thermal conductivity of superconducting material

answered Feb 10, 2021 at 0:16

6 votes

Why does diamond-graphite phase digram not contain a critical point?

answered Jun 9, 2020 at 6:02

6 votes

Why don't we have a "Cooper pair" of two holes in a superconductor?

answered Jul 10, 2020 at 21:55

6 votes

Accepted

How does the wavefunction inherit the symmetries from the Hamiltonian?

answered Jan 8, 2022 at 3:25

6 votes

Accepted

Is number of photons undefined for a classical EM wave?

answered Aug 11, 2020 at 6:38

6 votes

Accepted

Evading the $J=0$ to $J'=0$ forbidden selection rule?

answered Oct 29, 2022 at 18:57

5 votes

Accepted

Are electrostatic forces enough to trap charged particles?

answered Jul 31 at 1:45

5 votes

How is the Geometric Phase measured in the experiment?

answered Jul 3, 2022 at 14:58

5 votes

Accepted

Is there a three-body exclusive interaction?

answered Sep 10, 2020 at 13:58

5 votes

What is QED about "Cavity QED"?

answered Nov 12, 2019 at 13:29

5 votes

Accepted

Does phononic "Superconductivity" exist?

answered Jul 26, 2017 at 5:47

5 votes

Accepted

Matsubara Field Theory - what does imaginary time $\tau$ in $G(\tau,\mathbf{x})$ mean?

answered Jan 29, 2018 at 14:51

4 votes

Accepted

Are Type -II Dirac Fermions "true" particles that are not accounted for in the Standard Model?

answered Jul 13, 2017 at 3:10

4 votes

Accepted

Where does Huygens–Fresnel principle follow from?

answered Apr 6, 2017 at 23:02

4 votes

Ohm's law in metals

answered Jun 27, 2017 at 12:58

4 votes

Accepted

Is the Compton effect observed during regular x-ray diffraction?

answered May 19, 2019 at 7:10

Stack Exchange Network

128 Answers

How do I experimentally measure the surface area of a rock?

Why no proton microscopes? Proton diffraction; or proton scattering experiments? Proton crystallography?

Reverse of diffraction

Limit on how many photons can hit a surface

Why do we even need RF cavities to accelerate particles?

What is the minimum number of metal atoms necessary to make a mirror?

What colour is an electron?

Why aren't particles constantly "measured" by the whole universe?

Why does a transition between 2 $s$-orbitals work for cesium's clock transition?

Why are magnetic monopoles "incompatible" with quantum mechanics?

Do superconducting materials have "zero" work function?

Do hadrons have color moments?

The difference between optical phonons and acoustic phonons in terms of energy absorption

Why can't the density difference between the liquid and solid be an appropriate order parameter for liquid-to-solid transition?

Thermal conductivity of superconducting material

Why does diamond-graphite phase digram not contain a critical point?

Why don't we have a "Cooper pair" of two holes in a superconductor?

How does the wavefunction inherit the symmetries from the Hamiltonian?

Is number of photons undefined for a classical EM wave?

Evading the $J=0$ to $J'=0$ forbidden selection rule?

Are electrostatic forces enough to trap charged particles?

How is the Geometric Phase measured in the experiment?

Is there a three-body exclusive interaction?

What is QED about "Cavity QED"?

Does phononic "Superconductivity" exist?

Matsubara Field Theory - what does imaginary time $\tau$ in $G(\tau,\mathbf{x})$ mean?

Are Type -II Dirac Fermions "true" particles that are not accounted for in the Standard Model?

Where does Huygens–Fresnel principle follow from?

Ohm's law in metals

Is the Compton effect observed during regular x-ray diffraction?