User Jack - Physics Stack Exchange

13 votes

2 answers

2k views

In what sense the laser radiation is monochromatic?

asked Mar 12, 2023 at 11:24

11 votes

4 answers

2k views

Can the laser light, in principle, take any wavelength in the EM spectrum?

asked Jun 20 at 19:38

7 votes

2 answers

1k views

How a piece of metal put in the oven reaching a constant temperature of 3000 K fit the model of a hole in a cavity?

asked Jan 10, 2023 at 14:12

5 votes

2 answers

543 views

What theorem Feynman is referring to?

asked Oct 5, 2023 at 0:53

3 votes

1 answer

67 views

What is the secret behind the striking similarity between a quark pair and a bar magnet?

asked Apr 16, 2023 at 14:26

3 votes

2 answers

132 views

Does dimensional consistency imply the same units?

asked Nov 18, 2023 at 13:29

3 votes

1 answer

230 views

What is the difference between Clausius' entropy and Boltzmann's?

asked Dec 5, 2022 at 22:48

3 votes

2 answers

602 views

What is the meaning of a thermal equilibrium between matter and radiation?

asked Aug 10, 2022 at 1:10

2 votes

2 answers

88 views

How the braking radiation fit into the photon picture of light?

asked Mar 1, 2023 at 22:29

2 votes

0 answers

64 views

In a plain language, what does it mean when one says LASER has a high temporal and spacial coherence?

asked May 8, 2023 at 19:14

1 vote

0 answers

51 views

What is the temporal and spacial coherence of photons?

asked Dec 13, 2023 at 22:59

1 vote

0 answers

39 views

What would I observe with a light microscope operating at its full magnification if the specimen was smaller in diameter than the used wavelength?

asked Mar 10 at 9:34

1 vote

1 answer

22 views

Kirchoff's law of thermal radiation states that if an object emits at a wavelength then it also absorbs at the same wavelength

asked Mar 20 at 3:57

1 vote

2 answers

207 views

Is Joule equivalent to Joule/radian? [duplicate]

asked Nov 17, 2023 at 23:31

1 vote

2 answers

43 views

Which magnetic field is the one in the inductance equation?

asked Jun 10 at 16:39

1 vote

3 answers

640 views

If a magnet is completely inside a solenoid, but is moving, Does this induce an emf?

asked Jan 2, 2023 at 13:45

1 vote

1 answer

130 views

What is the interpretation of this integral equation $\psi(x,t_2)=\int G(x,y)\psi(y,t_1)dy$ of the generalized Huygens principle?

asked Feb 26, 2023 at 22:34

1 vote

1 answer

74 views

Is $B=μ_{0} nI$ for the magnetic field magnitude at the center of the solenoid axis only?

asked Apr 4, 2023 at 20:59

1 vote

3 answers

165 views

A voltage drop means a loss in energy in the form of heat for example in a resistor, in what form the voltage drop across an inductor is?

asked Jul 25, 2023 at 21:53

1 vote

0 answers

59 views

What does simultaneity mean in Heisenberg's uncertainty in terms of the experimental apparatus?

asked Sep 1, 2022 at 9:39

1 vote

2 answers

641 views

Can a photon have a radius?

asked Dec 17, 2022 at 7:05

1 vote

1 answer

67 views

What did Einstein mean when he said a gravitational field that is not derivable from the Galilean special case?

asked Dec 21, 2022 at 13:02

1 vote

0 answers

25 views

In a DC motor, why would the rotor oscillate around its stable equilibrium point, had there been a constant current?

asked Jan 15, 2023 at 9:41

1 vote

2 answers

179 views

Do we use $p=ρgh$ to calculate the pressure caused by any materials or just by liquids?

asked Feb 5, 2023 at 15:38

1 vote

2 answers

47 views

Is the emitted spectrum is that of a blackbody when the blackbody is in thermal equilibrium with the ambient or with its interior or either?

asked Feb 16, 2023 at 20:49

0 votes

2 answers

63 views

In the photoelectric effect experiment shown in the figure down below, Does the galvanometer only read the photocurrent?

asked Feb 17, 2023 at 12:21

0 votes

1 answer

48 views

Why the blackbody's spectral emittance isn't a growing exponential in the wavelength?

asked Feb 19, 2023 at 23:48

0 votes

1 answer

99 views

In a LR circuit, Why do the current rate of increase decreases with time? [closed]

asked Dec 28, 2022 at 17:03

0 votes

2 answers

137 views

How do we make an observation of a 4D spacetime trajectory if we, observers, have only access to a 3D world?

asked Dec 15, 2022 at 22:26

0 votes

1 answer

93 views

Correct my understanding of the logical flow of the formulation of General Relativity

asked Oct 13, 2022 at 13:05

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71 Questions

In what sense the laser radiation is monochromatic?

Can the laser light, in principle, take any wavelength in the EM spectrum?

How a piece of metal put in the oven reaching a constant temperature of 3000 K fit the model of a hole in a cavity?

What theorem Feynman is referring to?

What is the secret behind the striking similarity between a quark pair and a bar magnet?

Does dimensional consistency imply the same units?

What is the difference between Clausius' entropy and Boltzmann's?

What is the meaning of a thermal equilibrium between matter and radiation?

How the braking radiation fit into the photon picture of light?

In a plain language, what does it mean when one says LASER has a high temporal and spacial coherence?

What is the temporal and spacial coherence of photons?

What would I observe with a light microscope operating at its full magnification if the specimen was smaller in diameter than the used wavelength?

Kirchoff's law of thermal radiation states that if an object emits at a wavelength then it also absorbs at the same wavelength

Is Joule equivalent to Joule/radian? [duplicate]

Which magnetic field is the one in the inductance equation?

If a magnet is completely inside a solenoid, but is moving, Does this induce an emf?

What is the interpretation of this integral equation $\psi(x,t_2)=\int G(x,y)\psi(y,t_1)dy$ of the generalized Huygens principle?

Is $B=μ_{0} nI$ for the magnetic field magnitude at the center of the solenoid axis only?

A voltage drop means a loss in energy in the form of heat for example in a resistor, in what form the voltage drop across an inductor is?

What does simultaneity mean in Heisenberg's uncertainty in terms of the experimental apparatus?

Can a photon have a radius?

What did Einstein mean when he said a gravitational field that is not derivable from the Galilean special case?

In a DC motor, why would the rotor oscillate around its stable equilibrium point, had there been a constant current?

Do we use $p=ρgh$ to calculate the pressure caused by any materials or just by liquids?

Is the emitted spectrum is that of a blackbody when the blackbody is in thermal equilibrium with the ambient or with its interior or either?

In the photoelectric effect experiment shown in the figure down below, Does the galvanometer only read the photocurrent?

Why the blackbody's spectral emittance isn't a growing exponential in the wavelength?

In a LR circuit, Why do the current rate of increase decreases with time? [closed]

How do we make an observation of a 4D spacetime trajectory if we, observers, have only access to a 3D world?

Correct my understanding of the logical flow of the formulation of General Relativity