570 reputation
212
bio website
location France
age 24
visits member for 1 year, 9 months
seen Aug 3 at 12:35

May
27
awarded  Enthusiast
May
19
comment How do people work out the trajectories of planets and stars just by looking at them?
Good answer, but it is sad that the name of Tycho Brahe doesn't appear. He was one of those who realized measurements that allowed Kepler to derive his laws.
May
13
reviewed Reviewed Why doesn't more light bounce off of things in the manner of sound?
May
9
reviewed Reviewed A voltage-controlled oscillator?
May
7
comment Why is Spin Less Classical than Position?
@Lior One don't need spin in classical physics.
May
7
comment Why is Spin Less Classical than Position?
@Lior Ok, you might define that kind of system for a particle. Now what real particle is described by such physics ?
May
7
comment Why is Spin Less Classical than Position?
@Lior I agree with rob. You can decide to add any internal degree of freedom you want but if it can be expressed with the others DOF then it is not a degree of freedom. Adding it doesn't give additional information about the system and it is thus irrelevant.
May
7
comment Why is Spin Less Classical than Position?
But in classical physics any particle has at most 3 degree of freedom. I can describe the state of any particle with 6 numbers (3 for position and 3 for momentum), the classical description doesn't need this additional degree of freedom (the spin).
May
7
answered Why is Spin Less Classical than Position?
May
7
comment What does $\left|x,t\right>$ actually mean (Heisenberg picture)?
May I ask where you did find such a notation for Heisenberg states ?
May
7
awarded  Citizen Patrol
May
7
reviewed Reviewed Rocky Planet in the center of System
May
5
comment Similarity between spinless fermion and weakly interacting bosons
@Ali The fact that fermions have half-integer spin doesn't keep them from behaving as bosons under certain specific conditions or in a specific model.
May
5
comment Interpreting current in a material as a Stark effect
In a solid you don't need the stark effect to split energy levels. The periodicity of the lattice (i.e. the large number of particles) does that for you. Applying an electric field on the continuum of states doesn't change much, maybe the stark effect is then ineffective.
May
4
reviewed No Action Needed How does light bend around my finger tip?
May
3
reviewed Reviewed Getting started general relativity
Apr
30
comment When we do pull-ups , does the bar takes more weight than when we hang down on the bar?
@Thriveth I dare you to design a device able to measure the difference between the force one apply to the bar when hanged down and the force applied to the bar when one is up :)
Apr
30
reviewed Reviewed Is the presence of the phase velocity of De-Broglie wave in the Lorentz Transformations a mere coincidence?
Apr
30
comment Does a photon travel through space exactly at the speed of light?
Even if the vaccum is not perfectly empty, it doesn't mean that the density of matter in space is continuous. There might be some particles at some points, but if the photon doesn't encounter them it travels at the speed of light. If the photon meets a particle in the vacuum then it's going to interact with it in some way.
Apr
30
awarded  Critic