Recent content by kor

From the graph above, I want to ask if the external magnetic field change from the negative to positive. At Point B , the physically larger one will have a larger value ?

Yup It is the physical size. I am sorry about the misleading. I just want to say they have the same easy axis . I am sorry about that.

I want to know the wideness of the material versus the shape of the hysteresis loop

The material is ferromagnetic material. I want to know the effect of the wideness in the hysteresis loop

For the same material, same rectangular shape and the same length, The wider one or the narrow one will switch their magnetic direction parallel to the applied magnetic field(assuming their direction is anti parallel to the magnetic field initially )? And Why?

What is the spin direction of the electrons through the ferromagnetic material? It will become parallel or antiparallel? I was confused because the scattering rate and conductivity both depend on the density of state at Fermi level. For ferromagnetic material, is it right to say that at the...

Oh ic And that only absolute way to connect your time and space to mine is spacetime,right?

Although in Lorentz transformation, we can see that x'= related to x and t What i don't understand is that this is the transformation between different frame If in a single frame how time and space are related ?

although I still don't understand it (it needs time ), thank you for your help :smile:

[OFF TOPIC] What maths's level is required the above equation? furthermore, at brewster's angle , what is the source of the reflected light ?

YUP That's brewster's law but what's the principle behind it ? What's the fresnel coefficients ?

except the maths. methods can anyone explain why the reflected light is polarised while the refracted light is partially polarised in brewster angle ,please??