User Ruslan

78

93

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9

answers

30k

views

How is quantum superposition different from mixed state?

Jun 30 at 17:47 abir 151

1

vote

2

answers

17k

views

How to calculate temperature of an incandescent bulb filament?

thermodynamics electricity temperature

Mar 8 '17 at 5:09 hammo 1

1

0

votes

2

answers

6k

views

Why is glow visible around bright light sources in darkness?

visible-light vision

Sep 15 '16 at 8:01 tfb 20.8k

1

3

votes

1

answer

5k

views

Vector and scalar potentials of plane wave

electromagnetic-radiation potential

Nov 8 '18 at 23:08 ProfRob 92.2k

2

votes

2

answers

3k

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Derivation of relativistic uniformly accelerated motion

homework-and-exercises special-relativity acceleration

Mar 4 '14 at 0:05 sciencemonk 41

5

12

votes

3

answers

3k

views

Visualizing GR spacetime distortion in 1+1D spacetime instead of 2D space

general-relativity spacetime visualization

Aug 22 '19 at 8:10 Glorfindel 1,003

1

3

votes

1

answer

2k

views

Can this simple spectrometer be precise without collimation?

optics spectroscopy diffraction

Sep 23 '14 at 13:25 Chris Mueller 6,275

1

4

votes

3

answers

2k

views

Is there any time-dependent hydrogen atom Schrödinger equation, solvable analytically?

quantum-mechanics schroedinger-equation hydrogen

Nov 4 '17 at 20:46 Emilio Pisanty 113k

2

1

vote

1

answer

2k

views

Why is Heisenberg picture used if Schrödinger picture is simpler?

quantum-mechanics

May 7 '14 at 15:44 alanf 4,935

4

1

vote

1

answer

2k

views

Total vs partial time derivative of action

lagrangian-formalism action differentiation

Nov 3 '14 at 16:00 Chanto 170

14

18

votes

1

answer

2k

views

Interpretation of Dirac equation states

wavefunction dirac-equation

Dec 4 '14 at 12:27 Piotr Migdal 6,181

1

2

votes

1

answer

1k

views

Where to find detailed measured emission spectra of all chemical elements?

resource-recommendations spectroscopy chemical-compounds

Dec 4 '15 at 19:22 Emilio Pisanty 113k

4

5

votes

4

answers

1k

views

Why can interference from two independent sources be observed?

quantum-mechanics interference

Mar 18 '14 at 19:34 Community♦ 1

9

votes

1

answer

1k

views

Are pure mechanical evanescent waves possible?

waves acoustics

Dec 26 '13 at 2:58 Community♦ 1

3

2

votes

2

answers

1k

views

How to connect Rabi frequency with absorption intensity?

quantum-mechanics quantum-optics absorption

Dec 13 '14 at 23:31 sa101 327

3

8

votes

1

answer

1k

views

Can a quasiclassical electron wave packet in elliptic orbit be formed from bound hydrogen-like eigenstates?

quantum-mechanics wavefunction hydrogen

Mar 2 '19 at 12:00 Ruslan 19.7k

4

votes

1

answer

998

views

Does action really have to be Lorentz-invariant in SR?

special-relativity symmetry inertial-frames action

Jan 30 '14 at 22:58 Community♦ 1

1

2

votes

4

answers

936

views

Does the angular momentum vector operator $\hat{\vec{J}}$ have no eigenstates?

quantum-mechanics angular-momentum operators

Nov 12 '14 at 19:22 Qmechanic♦ 141k

1

4

votes

1

answer

932

views

Why are doubly-excited states in helium not square integrable?

quantum-mechanics atomic-physics

Feb 22 '17 at 13:06 Community♦ 1

9

12

votes

3

answers

909

views

Can spin-1/2 emerge as a property of quasiparticles if original description of the system was without spin?

quantum-mechanics quantum-spin topological-order quasiparticles

Aug 12 '18 at 12:10 Xiao-Gang Wen 11.1k

2

8

votes

5

answers

831

views

What does electric field of unpolarized light look like when measured?

electromagnetic-radiation polarization

Nov 4 '18 at 16:08 Ruslan 19.7k

2

3

votes

0

answers

804

views

What is the symmetry group of this Hamiltonian?

quantum-mechanics symmetry

Feb 4 '15 at 15:51 Ruslan 19.7k

6

votes

2

answers

782

views

Inexact measurement and wavefunction collapse

quantum-mechanics wavefunction wavefunction-collapse observables

Jan 4 '14 at 11:57 Nanite 3,074

7

10

votes

1

answer

779

views

How will SR EM Lagrangian change if we find a magnetic charge?

electromagnetism lagrangian-formalism gauge-theory magnetic-monopoles

Jul 22 '17 at 8:36 Phoenix87 8,910

1

4

votes

2

answers

727

views

Is mean kinetic energy related to temperature of a system of interacting classical particles?

thermodynamics classical-mechanics temperature ideal-gas kinetic-theory

Dec 31 '16 at 16:53 Ken G 3,022

2

votes

1

answer

719

views

Three body force

three-body-problem

Dec 31 '13 at 17:41 Community♦ 1

11

votes

3

answers

712

views

Renormalization in non-relativistic quantum mechanics

quantum-mechanics renormalization

Oct 13 '16 at 10:53 Community♦ 1

1

6

votes

2

answers

695

views

Why are S-state solutions of Dirac equation for hydrogen atom allowed to be unbounded?

quantum-mechanics wavefunction dirac-equation singularities hydrogen

Nov 19 '16 at 19:53 Community♦ 1

2

4

votes

2

answers

655

views

How can Lorentz contraction be “directly” measured?

special-relativity measurements length-contraction

Jan 31 '18 at 22:12 Mr Wool 1

3

votes

1

answer

634

views

Finding frame of reference where angular momentum appears zero

reference-frames rotation

Aug 5 '13 at 19:22 Ruslan 19.7k

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113 Questions

How is quantum superposition different from mixed state?

How to calculate temperature of an incandescent bulb filament?

Why is glow visible around bright light sources in darkness?

Vector and scalar potentials of plane wave

Derivation of relativistic uniformly accelerated motion

Visualizing GR spacetime distortion in 1+1D spacetime instead of 2D space

Can this simple spectrometer be precise without collimation?

Is there any time-dependent hydrogen atom Schrödinger equation, solvable analytically?

Why is Heisenberg picture used if Schrödinger picture is simpler?

Total vs partial time derivative of action

Interpretation of Dirac equation states

Where to find detailed measured emission spectra of all chemical elements?

Why can interference from two independent sources be observed?

Are pure mechanical evanescent waves possible?

How to connect Rabi frequency with absorption intensity?

Can a quasiclassical electron wave packet in elliptic orbit be formed from bound hydrogen-like eigenstates?

Does action really have to be Lorentz-invariant in SR?

Does the angular momentum vector operator $\hat{\vec{J}}$ have no eigenstates?

Why are doubly-excited states in helium not square integrable?

Can spin-1/2 emerge as a property of quasiparticles if original description of the system was without spin?

What does electric field of unpolarized light look like when measured?

What is the symmetry group of this Hamiltonian?

Inexact measurement and wavefunction collapse

How will SR EM Lagrangian change if we find a magnetic charge?

Is mean kinetic energy related to temperature of a system of interacting classical particles?

Three body force

Renormalization in non-relativistic quantum mechanics

Why are S-state solutions of Dirac equation for hydrogen atom allowed to be unbounded?

How can Lorentz contraction be “directly” measured?

Finding frame of reference where angular momentum appears zero