Famous Question - Badge - Physics Stack Exchange

Famous Question

Question with 10,000 views. This badge can be awarded multiple times.

Awarded 6002 times.

What is Wick's theorem and what this is use for? [closed]

Awarded 6 hours ago

Blueyeti

811 gold badge1 silver badge3 bronze badges

Why is $\theta \over 2$ used for a Bloch sphere instead of $\theta$?

Awarded 7 hours ago

Mike Wong

4491 gold badge5 silver badges7 bronze badges

Why is velocity of outermost point on a rotating wheel double the velocity of centre of mass?

Awarded 2 days ago

Rajath Radhakrishnan

3,9159 gold badges50 silver badges84 bronze badges

Is mass an observable in Quantum Mechanics?

Awarded 2 days ago

Revo

17.3k28 gold badges99 silver badges151 bronze badges

Generators of the $SU(2) $group

Awarded 2 days ago

Jbag1212

2,7401 gold badge14 silver badges32 bronze badges

If electrons can be created and destroyed, then why can't charges be created or destroyed? [duplicate]

Awarded 2 days ago

Poorvaja Jain

3671 gold badge2 silver badges4 bronze badges

Why does Density Functional Theory (DFT) underestimate bandgaps?

Awarded 2 days ago

P.A.M

1,6292 gold badges19 silver badges29 bronze badges

Can a convex mirror form a real image?

Awarded 2 days ago

spatialdelusion

4543 gold badges8 silver badges19 bronze badges

Silicon atom: How is it replaced by a Phosphorous (or Boron) atom?

Awarded Dec 8 at 3:18

Sensebe

5,83915 gold badges58 silver badges86 bronze badges

2D isotropic quantum harmonic oscillator: polar coordinates

Awarded Dec 7 at 23:38

Charlie

1,2021 gold badge13 silver badges35 bronze badges

Calculate pressure difference between two points using a differential gauge

Awarded Dec 6 at 12:48

Álvaro Franz

3592 gold badges5 silver badges17 bronze badges

Is an oscillation the same as a period?

Awarded Dec 5 at 5:15

Ray Kay

1,6604 gold badges19 silver badges32 bronze badges

Are protons bigger than electrons?

Awarded Dec 4 at 17:02

alienare 4422

1,1891 gold badge9 silver badges17 bronze badges

What is meant by a "c-number"?

Awarded Dec 4 at 15:09

Student

2691 gold badge2 silver badges9 bronze badges

Redshift-distance relation, and redshift-scale factor relation

Awarded Dec 4 at 3:02

JonTrav1

9801 gold badge6 silver badges19 bronze badges

Capacitance of a single charged plate?

Awarded Dec 4 at 2:16

John Burgerman

811 gold badge1 silver badge3 bronze badges

Where does the 1.22 come from in Rayleigh criterion for circular apertures?

Awarded Dec 3 at 16:42

Will thorne

1341 gold badge1 silver badge15 bronze badges

Time as a Hermitian operator in quantum mechanics

Awarded Dec 2 at 21:20

skywaddler

1,5154 gold badges20 silver badges22 bronze badges

Why do electrons absorb and re-emit photons?

Awarded Dec 2 at 7:05

Saptarshi sarma

6831 gold badge6 silver badges10 bronze badges

How does space affect the human body (no space suit, no space craft)

Awarded Nov 30 at 3:47

nopcorn

1,2791 gold badge13 silver badges17 bronze badges

Recipe for computing vertex factors in Feynman diagrams

Awarded Nov 26 at 11:00

PhHEP

6332 gold badges6 silver badges15 bronze badges

"Reality" of length contraction in SR

Awarded Nov 25 at 3:33

Frank

3,4536 gold badges28 silver badges40 bronze badges

What are some of the best books on complex systems and emergence?

Awarded Nov 24 at 9:41

Joebevo

2,27110 gold badges36 silver badges61 bronze badges

Why Do Sausages Always Split Lengthwise?

Awarded Nov 24 at 9:12

Dale

6,0826 gold badges43 silver badges68 bronze badges

What do photons look like?

Awarded Nov 23 at 21:09

Ambica Govind

1,6372 gold badges11 silver badges27 bronze badges

Calculating gravity when taking into account the change of gravitational force

Awarded Nov 23 at 5:26

Freyja

1741 gold badge1 silver badge9 bronze badges

Why exactly do sometimes universal covers, and sometimes central extensions feature in the application of a symmetry group to quantum physics?

Awarded Nov 22 at 9:55

ACuriousMind♦

129k31 gold badges293 silver badges701 bronze badges

Line of vision - If I cannot see someone, is it possible that they can see me?

Awarded Nov 21 at 22:06

worriedsickly

271 gold badge1 silver badge2 bronze badges

What is the unit of time on the Voyager Golden Record?

Awarded Nov 21 at 19:52

Brent Bradburn

1831 gold badge1 silver badge6 bronze badges

Time ordering and time derivative in path integral formalism and operator formalism

Awarded Nov 20 at 14:56

Jia Yiyang

4,0653 gold badges29 silver badges45 bronze badges

Why does tension in string become zero when it is at the top most point in a vertical circle?

Awarded Nov 19 at 20:40

McFluff

1631 gold badge1 silver badge8 bronze badges

Vibrating string, free end boundary condition

Awarded Nov 18 at 20:52

user3208430

2431 gold badge2 silver badges7 bronze badges

Is there a limit to how strong a vacuum can be?

Awarded Nov 18 at 17:22

user7778287

1411 gold badge1 silver badge5 bronze badges

Passing electrical current through magnets

Awarded Nov 17 at 19:55

Daniel

1871 gold badge2 silver badges9 bronze badges

Finite potential well problem - calculating the ground state

Awarded Nov 17 at 12:49

71GA

2,5857 gold badges46 silver badges73 bronze badges

Lagrangian method for an $LC$-Circuit

Awarded Nov 14 at 21:43

Razor

4591 gold badge7 silver badges22 bronze badges

Kinetic Energy in the Center of Mass Frame

Awarded Nov 14 at 16:21

ubomb

1551 gold badge1 silver badge5 bronze badges

Solving Schrödinger's equation with Crank-Nicolson method

Awarded Nov 14 at 7:34

liberias

5751 gold badge5 silver badges16 bronze badges

Photoelectric effect – Why does one electron absorb only one photon?

Awarded Nov 13 at 20:49

TheQuantumMan

7,8606 gold badges36 silver badges96 bronze badges

How do we know which direction heat flows? From cold to hot, or from hot to cold?

Awarded Nov 13 at 12:35

bodacydo

1,3132 gold badges15 silver badges23 bronze badges

Vertical and Horizontal Oscillations With the same period and speeds

Awarded Nov 13 at 6:15

lianameere

272 gold badges2 silver badges6 bronze badges

Why an extra path difference of wavelength/2 is added when light reflects?

Awarded Nov 12 at 9:08

Rajath Radhakrishnan

3,9159 gold badges50 silver badges84 bronze badges

What exactly will happen if you jump in the upward direction from a roof of on a moving car?

Awarded Nov 12 at 5:16

graham89

131 gold badge1 silver badge3 bronze badges

Gravitational field intensity inside a hollow sphere

Awarded Nov 11 at 14:27

Gummy bears

1,5825 gold badges22 silver badges39 bronze badges

What is the difference between kinetic momentum $p=mv$ and canonical momentum?

Awarded Nov 11 at 13:51

Stoby

5401 gold badge4 silver badges14 bronze badges

How is the Breit-Rabi formula derived?

Awarded Nov 10 at 20:51

yatima2975

2031 gold badge3 silver badges9 bronze badges

length contraction in a gravitational field [duplicate]

Awarded Nov 9 at 19:42

barney.tearspell

711 gold badge1 silver badge5 bronze badges

Stair machine Vs stairs. which is harder?

Awarded Nov 9 at 16:55

Angus Keane

511 gold badge1 silver badge3 bronze badges

In a vacuum, can you see light which is not travelling towards you?

Awarded Nov 9 at 4:32

Júlia Sirotiaková

4811 gold badge4 silver badges6 bronze badges

Significances of energy conditions

Awarded Nov 9 at 4:12

user1349

2,1491 gold badge15 silver badges24 bronze badges

Do the terms "damping constant" and "damping coefficient" have standard uses?

Awarded Nov 8 at 11:10

VortixDev

1731 gold badge1 silver badge8 bronze badges

Space Elevator on Mars with Today's Technology Possible?

Awarded Nov 8 at 3:20

mring

9212 gold badges8 silver badges14 bronze badges

What is an orthogonal state?

Awarded Nov 8 at 2:06

Phi

4431 gold badge3 silver badges11 bronze badges

Why is the Fermi level (energy) shfited in doped semiconductors?

Awarded Nov 7 at 14:13

Ben

1,5371 gold badge13 silver badges40 bronze badges

Does Feynman's derivation of Maxwell's equations have a physical interpretation?

Awarded Nov 7 at 14:13

Yuzuriha Inori

1,9371 gold badge12 silver badges21 bronze badges

What's the relationship between glow and arc discharge?

Awarded Nov 6 at 12:51

Calmarius

8,26010 gold badges47 silver badges78 bronze badges

Why the coefficient of volume expansion is three times the linear coefficient expansion?

Awarded Nov 5 at 5:50

Dewton

1551 gold badge2 silver badges6 bronze badges

Is time travel impossible because it implies total energy in the universe is non-constant over time?

Awarded Nov 2 at 21:30

John Paul

1591 gold badge1 silver badge4 bronze badges

In Circular motion, why $v = \omega × r$?

Awarded Oct 31 at 12:34

Álvaro Rodrigo

1,5631 gold badge5 silver badges24 bronze badges

Commutation of vector operators

Awarded Oct 31 at 9:49

user55789

2912 gold badges6 silver badges15 bronze badges

2 3 4 5

…

101 Next