User John

53 votes

4 answers

26k views

Does a photon exert a gravitational pull?

asked Mar 27, 2012 at 13:33

31 votes

3 answers

4k views

How strong were the gravitational waves that LIGO detected at the source?

general-relativity gravity experimental-physics gravitational-waves ligo

asked Feb 11, 2016 at 16:57

22 votes

4 answers

6k views

QM and Renormalization (layman)

quantum-mechanics quantum-field-theory symmetry renormalization popular-science

asked Jan 9, 2012 at 20:08

13 votes

5 answers

3k views

Will the CMB ever stop shining?

cosmology cosmic-microwave-background observable-universe

asked Aug 5, 2014 at 19:02

11 votes

10 answers

10k views

According to General Relativity, Does The Past "Exist"?

general-relativity spacetime time causality

asked Jul 16, 2012 at 14:56

10 votes

3 answers

773 views

Can entanglement be explained as a consequence of conservation laws?

quantum-information conservation-laws quantum-entanglement faster-than-light

asked Aug 6, 2013 at 20:27

9 votes

5 answers

8k views

Why does a photon colliding with an atomic nucleus cause pair production?

quantum-mechanics photons pair-production

asked Mar 8, 2013 at 18:32

9 votes

1 answer

308 views

Seeing beyond the CMBR with neutrinos?

big-bang neutrinos cosmic-microwave-background

asked Aug 5, 2014 at 16:11

7 votes

3 answers

11k views

Non-Newtonian Fluid Stop a Bullet?

fluid-dynamics

asked Jul 11, 2012 at 21:28

7 votes

4 answers

6k views

How long would it take to travel through a wormhole?

general-relativity gravity time wormholes

asked Jan 20, 2012 at 18:26

5 votes

2 answers

2k views

Incompatibility Between Relativity and Quantum Mechanics

quantum-mechanics general-relativity gravity

asked Feb 1, 2012 at 18:03

5 votes

2 answers

2k views

CPT Violation and Symmetry / Conservation Laws

energy-conservation symmetry noethers-theorem time-reversal-symmetry cpt-symmetry

asked Nov 19, 2012 at 18:56

4 votes

2 answers

398 views

Proton-Neutron Lattice as a form of matter?

nuclear-physics protons neutrons

asked Apr 25, 2012 at 20:57

4 votes

2 answers

193 views

Sequential Double Double Slit Experiment?

quantum-mechanics photons wavefunction double-slit-experiment wavefunction-collapse

asked Aug 19, 2019 at 14:44

4 votes

2 answers

1k views

Can the universe be unbounded and yet have a finite amount of stars and galaxies?

cosmology spacetime universe space-expansion

asked Dec 6, 2017 at 16:51

3 votes

1 answer

104 views

Determine expansion rate of universe from gravitational waves LIGO?

general-relativity cosmology space-expansion gravitational-waves ligo

asked Feb 12, 2018 at 19:21

3 votes

2 answers

303 views

How does a neutron star collision turn mass into gravitational waves?

general-relativity gravity gravitational-waves stress-energy-momentum-tensor neutron-stars

asked Feb 12, 2018 at 19:29

3 votes

2 answers

266 views

Is a 4 dimensional spherical universe possible with flat curvature?

cosmology spacetime universe curvature

asked Dec 6, 2017 at 15:56

3 votes

1 answer

625 views

Higgs Field compared to EM field

quantum-mechanics electromagnetism quantum-field-theory higgs

asked Dec 12, 2011 at 21:05

3 votes

1 answer

464 views

LIGO Gravitational Waves [closed]

general-relativity gravity gravitational-waves ligo gravitational-wave-detectors

asked Aug 30, 2012 at 0:35

2 votes

1 answer

181 views

If the universe is a $3$-torus, must it be longer in some direction?

general-relativity cosmology topology

asked Oct 5, 2018 at 20:06

2 votes

1 answer

187 views

How can the size of the universe change over time when time is part of the universe?

general-relativity cosmology spacetime time space-expansion

asked Jul 19, 2016 at 19:05

1 vote

1 answer

379 views

Could atmospheric muons be used to catalyze nuclear fusion?

fusion

asked Dec 8, 2015 at 16:05

1 vote

0 answers

99 views

Unification of forces in black hole singularity?

thermodynamics black-holes hawking-radiation grand-unification black-hole-firewall

asked Apr 27, 2020 at 18:43

1 vote

2 answers

413 views

Why does Quantum Electrodynamics Allow a Photon to Exist Temporarily as a Positron and an Electron?

photons quantum-electrodynamics virtual-particles pair-production

asked Mar 11, 2013 at 20:20

1 vote

1 answer

318 views

Number of Stars vs Value of Omega (Crtitical Density of the Universe)

cosmology universe curvature cosmological-inflation

asked Jul 28, 2014 at 15:14

1 vote

2 answers

299 views

Matter - Antimatter Reactory Practicality

particle-physics energy energy-conservation antimatter perpetual-motion

asked May 4, 2012 at 14:39

1 vote

0 answers

54 views

Expansion of space [duplicate]

space-expansion

asked Jul 27, 2012 at 1:19

0 votes

2 answers

500 views

Momentum Energy and Higgs

quantum-mechanics special-relativity energy quantum-gravity higgs

asked Dec 12, 2011 at 21:12

0 votes

3 answers

372 views

Accelerating expansion of the universe and cyclic model

cosmology big-bang space-expansion

asked Sep 22, 2012 at 22:23

Stack Exchange Network

current community

your communities

more stack exchange communities

30 Questions

Does a photon exert a gravitational pull?

How strong were the gravitational waves that LIGO detected at the source?

QM and Renormalization (layman)

Will the CMB ever stop shining?

According to General Relativity, Does The Past "Exist"?

Can entanglement be explained as a consequence of conservation laws?

Why does a photon colliding with an atomic nucleus cause pair production?

Seeing beyond the CMBR with neutrinos?

Non-Newtonian Fluid Stop a Bullet?

How long would it take to travel through a wormhole?

Incompatibility Between Relativity and Quantum Mechanics

CPT Violation and Symmetry / Conservation Laws

Proton-Neutron Lattice as a form of matter?

Sequential Double Double Slit Experiment?

Can the universe be unbounded and yet have a finite amount of stars and galaxies?

Determine expansion rate of universe from gravitational waves LIGO?

How does a neutron star collision turn mass into gravitational waves?

Is a 4 dimensional spherical universe possible with flat curvature?

Higgs Field compared to EM field

LIGO Gravitational Waves [closed]

If the universe is a $3$-torus, must it be longer in some direction?

How can the size of the universe change over time when time is part of the universe?

Could atmospheric muons be used to catalyze nuclear fusion?

Unification of forces in black hole singularity?

Why does Quantum Electrodynamics Allow a Photon to Exist Temporarily as a Positron and an Electron?

Number of Stars vs Value of Omega (Crtitical Density of the Universe)

Matter - Antimatter Reactory Practicality

Expansion of space [duplicate]

Momentum Energy and Higgs

Accelerating expansion of the universe and cyclic model