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10 votes
1 answer
6k views

Historic derivation of Wien's law

9 votes
3 answers
2k views

Why does the index of refraction change the direction of light?

4 votes
2 answers
4k views

Monochromatic wave

4 votes
1 answer
464 views

Ising model as quantum model?

3 votes
2 answers
309 views

Why is $\vec j\cdot \vec e$ the joule dissipation?

3 votes
2 answers
142 views

Why does choosing a time break covariance?

3 votes
3 answers
1k views

Quantum commutator

3 votes
3 answers
4k views

Irreversible process

2 votes
1 answer
1k views

Finding orbital eccentricity

2 votes
2 answers
5k views

Entropy exchange of a free fall

2 votes
2 answers
4k views

Kinetic energy of a cylinder

2 votes
2 answers
932 views

Decomposition of this wave function in eigenfunctions

2 votes
2 answers
6k views

Light dispersion in water

2 votes
1 answer
418 views

Correct form of the convection term in the Navier-Stokes equation

2 votes
1 answer
532 views

Diffusion and dispersion relation

1 vote
1 answer
2k views

Effect of slits and a lens

1 vote
1 answer
2k views

Why is the Baryon Acoustic Oscillations (BAO) calculated like this?

1 vote
0 answers
31 views

Numerically extracting free energy in renormalization procedure

1 vote
1 answer
2k views

Mirror/Parity symmetry in spin

1 vote
0 answers
64 views

Constant quantity associated to symmetry [closed]

1 vote
0 answers
311 views

Sum in the reciprocal lattice

1 vote
2 answers
1k views

Density of particles in hexagonal lattice

1 vote
0 answers
519 views

How to interpret a null critical exponent?

1 vote
1 answer
129 views

Magnetic force on capacitor

1 vote
1 answer
158 views

Thermodynamics of a bar, specific heat

1 vote
1 answer
1k views

Cylindrical wave

0 votes
1 answer
814 views

Dealing with experimental data

0 votes
1 answer
76 views

Circular polarisation

0 votes
1 answer
324 views

Time to emit electrons

0 votes
1 answer
405 views

Frank Hertz experiment and different jumps