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comment In what circumstances, can exchange interaction acquire temperature dependence?
Hmmm... Where did you read that the exchange interaction originates from the Coulomb interaction?
Dec
27
awarded  Nice Answer
Dec
25
awarded  Popular Question
Dec
12
comment What is a state in physics?
@DavidZ, true, but overall the question of what properties do we "attach" to a system is more about the system itself then about its state. And in that respect the notion of a system is even more metaphysical (at least when taken in general) than that of its state. Again, there will be at least a big difference between quantum and classical theories...
Dec
12
awarded  Yearling
Dec
11
answered What is a state in physics?
Oct
27
awarded  Excavator
Oct
27
revised Total internal reflection angle
Corrects LaTeX typeseting of sine functions.
Oct
27
suggested approved edit on Total internal reflection angle
Sep
30
reviewed No Action Needed Why does the water level go down when a dense object is moved from a boat to the bottom of the pool
Sep
30
reviewed No Action Needed Why Voltage Drop is not Influenced by Resistor Value?
Sep
30
awarded  Custodian
Sep
30
reviewed No Action Needed Information Brought by Electromagnetic Waves
Sep
30
reviewed Reviewed Can low-gravity planets sustain a breathable atmosphere?
Sep
30
reviewed No Action Needed Non-constant angular velocity
Sep
30
reviewed No Action Needed How can there be net linear momentum in a static electromagnetic field (not propagating)?
Sep
30
reviewed Reviewed Is the earth expanding?
Sep
30
reviewed No Action Needed Why does the sky look black in pictures taken from the summit of everest?
Sep
30
reviewed No Action Needed How the car keys prevent the shock caused by Static Electricity
Sep
30
reviewed No Action Needed Nanooptics microscopy limit