User Steve Byrnes

74 votes

Accepted

Photons from stars--how do they fill in such large angular distances?

answered Nov 26, 2013 at 17:29

47 votes

Accepted

What challenges needed to be overcome to create (blue) LEDs?

optics condensed-matter light-emitting-diodes

answered Oct 7, 2014 at 18:27

42 votes

Does Gödel preclude a workable ToE?

mathematics theory-of-everything

answered Sep 24, 2011 at 3:29

33 votes

Do all the conservation laws of Physics take no time to propagate?

conservation-laws faster-than-light

answered Aug 3, 2015 at 13:34

32 votes

Accepted

How can the Hall effect ever show positive charge carriers?

solid-state-physics

answered Jun 7, 2011 at 8:22

32 votes

Accepted

Can the Lorentz force expression be derived from Maxwell's equations?

electromagnetism forces maxwell-equations

answered Feb 3, 2012 at 14:32

27 votes

Is coherent light required for interference in Young's double slit experiment?

visible-light double-slit-experiment interference home-experiment popular-science

answered Sep 8, 2013 at 21:56

22 votes

Why does spin have a discrete spectrum?

quantum-mechanics angular-momentum quantum-spin discrete representation-theory

answered Jun 7, 2012 at 12:57

21 votes

QM without complex numbers

quantum-mechanics history complex-numbers

answered Jul 20, 2012 at 13:26

20 votes

Accepted

Is water really $H_2O$? On a comment concerning the quantum mechanical description of water made by Hilary Putnam

quantum-mechanics water physical-chemistry superposition molecules

answered Mar 6, 2018 at 3:41

18 votes

Homemade salad dressing separates into layers after it sits for a while. Why doesn't this violate the 2nd law of thermodynamics?

thermodynamics statistical-mechanics entropy

answered May 9, 2014 at 13:58

17 votes

What's the difference between Fermi Energy and Fermi Level?

energy definition electronic-band-theory chemical-potential fermi-energy

answered Jun 30, 2012 at 2:35

17 votes

Accepted

Consequences of the new theorem in QM?

quantum-mechanics quantum-interpretations

answered Nov 18, 2011 at 16:23

16 votes

Accepted

Pn junction voltage drop?

electric-circuits solid-state-physics potential semiconductor-physics electronics

answered Nov 17, 2013 at 15:38

16 votes

Accepted

Why use lasers for intense, localized heat instead of some other light source?

optics electromagnetic-radiation laser

answered Apr 24, 2014 at 17:34

15 votes

Is one way glass possible?

electromagnetism optics material-science

answered Jun 6, 2012 at 16:02

14 votes

How Special Relativity causes magnetism

electromagnetism special-relativity electricity

answered Dec 24, 2015 at 17:39

14 votes

Accepted

Why do spin-$\frac{1}{2}$ nuclei have zero electric quadrupole moment?

quantum-mechanics electromagnetism nuclear-physics quantum-spin

answered Aug 17, 2016 at 1:31

13 votes

Why don't the colors in an oil slick change as I walk past?

optics interference

answered May 17, 2016 at 2:40

11 votes

Why do we still not have an exact (constants-based) definition for a kilogram?

mass definition conventions si-units metrology

answered Jul 16, 2012 at 12:53

11 votes

Accepted

Why does light reflect more intensely when it hits a surface at a large angle?

optics reflection

answered Jul 9, 2011 at 4:42

11 votes

Accepted

Definition of mean free time in the Drude model

terminology definition

answered Nov 27, 2013 at 0:39

11 votes

Is it theoretically possible to reach $0$ Kelvin?

quantum-mechanics thermodynamics statistical-mechanics temperature

answered Jul 25, 2012 at 12:50

10 votes

Accepted

laser pointer class III and potential eye damage

optics laser laboratory-safety

answered Jan 3, 2013 at 18:37

10 votes

Perpetual motion machine of the second kind possible in nano technology?

thermodynamics entropy nanoscience perpetual-motion

answered Sep 2, 2013 at 0:04

10 votes

Does the rotation of the earth dramatically affect airplane flight time?

geometry aircraft rotation

answered Oct 31, 2011 at 18:27

10 votes

Accepted

What is the direction of propagating waves of the form $e^{ikx}$?

quantum-mechanics waves wavefunction schroedinger-equation conventions

answered Oct 9, 2016 at 16:44

10 votes

Is there a classical analog to quantum mechanical tunneling?

quantum-mechanics statistical-mechanics quantum-tunneling

answered Sep 12, 2014 at 19:10

10 votes

Faraday's paradox

electromagnetism induction

answered Dec 8, 2014 at 13:33

9 votes

Do we need Maxwell's Equations since they fail to account for an experimental fact at least in one occasion?

electromagnetism maxwell-equations

answered Sep 28, 2014 at 16:31

Stack Exchange Network

current community

your communities

more stack exchange communities

287 Answers

Photons from stars--how do they fill in such large angular distances?

What challenges needed to be overcome to create (blue) LEDs?

Does Gödel preclude a workable ToE?

Do all the conservation laws of Physics take no time to propagate?

How can the Hall effect ever show positive charge carriers?

Can the Lorentz force expression be derived from Maxwell's equations?

Is coherent light required for interference in Young's double slit experiment?

Why does spin have a discrete spectrum?

QM without complex numbers

Is water really $H_2O$? On a comment concerning the quantum mechanical description of water made by Hilary Putnam

Homemade salad dressing separates into layers after it sits for a while. Why doesn't this violate the 2nd law of thermodynamics?

What's the difference between Fermi Energy and Fermi Level?

Consequences of the new theorem in QM?

Pn junction voltage drop?

Why use lasers for intense, localized heat instead of some other light source?

Is one way glass possible?

How Special Relativity causes magnetism

Why do spin-$\frac{1}{2}$ nuclei have zero electric quadrupole moment?

Why don't the colors in an oil slick change as I walk past?

Why do we still not have an exact (constants-based) definition for a kilogram?

Why does light reflect more intensely when it hits a surface at a large angle?

Definition of mean free time in the Drude model

Is it theoretically possible to reach $0$ Kelvin?

laser pointer class III and potential eye damage

Perpetual motion machine of the second kind possible in nano technology?

Does the rotation of the earth dramatically affect airplane flight time?

What is the direction of propagating waves of the form $e^{ikx}$?

Is there a classical analog to quantum mechanical tunneling?

Faraday's paradox

Do we need Maxwell's Equations since they fail to account for an experimental fact at least in one occasion?