User InertialObserver

41 votes

Accepted

Why didn't Lorentz conclude that no object can go faster than light?

answered Feb 20, 2019 at 8:42

7 votes

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What really is the speed of light in a medium/vacuum, group or phase velocity?

answered Dec 26, 2018 at 2:34

6 votes

Do "fields" always combine by addition?

answered Feb 27, 2019 at 2:18

6 votes

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Did Eratosthenes make his measurements on the same day?

answered Jan 9, 2019 at 1:53

6 votes

Divergence of magnetic field

answered Jan 6, 2019 at 10:36

5 votes

Is physics the same everywhere in the universe? What if it isn't?

answered Dec 26, 2018 at 22:17

4 votes

Angular momentum in different points

answered Dec 27, 2018 at 21:32

4 votes

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Why does electric field undergo a discontinuity when we cross $any$ surface charge $σ$?

answered Dec 23, 2018 at 6:42

4 votes

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How can I explicitly express the Ising Hamiltonian in matrix form?

answered Dec 29, 2018 at 22:43

4 votes

Why is angular frequency $\omega = \sqrt{\frac{k}{m}}$ dimensionally correct?

answered Dec 29, 2018 at 23:00

4 votes

Accepted

Is magnetic Field conservative in nature?

answered Jul 14, 2018 at 4:39

4 votes

Does the Schrodinger wave function associated with a non-moving free particle change in time?

answered Jan 3, 2019 at 8:07

4 votes

Why does a sign difference between space and time lead to time that only flows forward?

answered Jan 3, 2019 at 22:54

4 votes

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Can non-uniform circular motion be called as periodic motion?

answered Jan 4, 2019 at 1:54

4 votes

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How to understand complex masses of unstable particles? The conceptual problem of calculating decay rate

answered Jan 7, 2019 at 3:17

4 votes

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Orthonormal basis written in Dirac Notation

answered Feb 18, 2019 at 10:23

4 votes

What is scattering of light?

answered Sep 13, 2021 at 10:18

3 votes

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Mixing $SU(N)$ and $U(1)$ generators to form an unbroken $U(1)’$

answered Sep 13, 2021 at 10:35

3 votes

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Equal-time 2-point correlator and divergent (?) integral

answered Nov 16, 2021 at 19:39

3 votes

Accepted

Why can we factorize the state of a particle?

answered Mar 19, 2019 at 22:22

3 votes

What does matrices act on different spaces mean in QFT?

answered Apr 27, 2019 at 22:27

3 votes

Show Lagrangian is invariant under infinitesimal $SO(3)$ transformation

answered Nov 12, 2019 at 17:29

3 votes

Accepted

Lagrangian of Klein Gordon equation

answered Feb 26, 2019 at 1:24

3 votes

Is outside force needed to conserve angular momentum?

answered Jan 5, 2019 at 21:42

3 votes

Subtraction scheme invariance in QFT

answered Jan 8, 2019 at 0:19

3 votes

Rotation of scalar

answered Sep 3, 2018 at 21:52

3 votes

Why is the magnetic field due to an infinite current sheet constant throughout all of space?

answered Jan 2, 2017 at 1:22

3 votes

What is the capacitance of a parallel plate capacitor with different areas?

answered Jan 4, 2017 at 15:30

3 votes

Accepted

Formula for Power from Kinetic Energy

answered Dec 30, 2018 at 2:43

3 votes

What is physically different about a moving vs still object in space?

answered Dec 30, 2018 at 22:57

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148 Answers

Why didn't Lorentz conclude that no object can go faster than light?

What really is the speed of light in a medium/vacuum, group or phase velocity?

Do "fields" always combine by addition?

Did Eratosthenes make his measurements on the same day?

Divergence of magnetic field

Is physics the same everywhere in the universe? What if it isn't?

Angular momentum in different points

Why does electric field undergo a discontinuity when we cross $any$ surface charge $σ$?

How can I explicitly express the Ising Hamiltonian in matrix form?

Why is angular frequency $\omega = \sqrt{\frac{k}{m}}$ dimensionally correct?

Is magnetic Field conservative in nature?

Does the Schrodinger wave function associated with a non-moving free particle change in time?

Why does a sign difference between space and time lead to time that only flows forward?

Can non-uniform circular motion be called as periodic motion?

How to understand complex masses of unstable particles? The conceptual problem of calculating decay rate

Orthonormal basis written in Dirac Notation

What is scattering of light?

Mixing $SU(N)$ and $U(1)$ generators to form an unbroken $U(1)’$

Equal-time 2-point correlator and divergent (?) integral

Why can we factorize the state of a particle?

What does matrices act on different spaces mean in QFT?

Show Lagrangian is invariant under infinitesimal $SO(3)$ transformation

Lagrangian of Klein Gordon equation

Is outside force needed to conserve angular momentum?

Subtraction scheme invariance in QFT

Rotation of scalar

Why is the magnetic field due to an infinite current sheet constant throughout all of space?

What is the capacitance of a parallel plate capacitor with different areas?

Formula for Power from Kinetic Energy

What is physically different about a moving vs still object in space?