Recent content by good_phy

Hi. i'm actually under the department of the applied optics so I had very few change to face the concept, tensor. But my research topics is highly related to particle acceleator so tensor concept is need to be understanded to go straightfoward. I'm looking for tensor textbook...

Thank you for sharing me. Then i'll ask you what is the good plasma physics textbook which is good combination with Chen book? did you get any idea?

Hi i just learned fluide equation form chen textbok The equation is mn\left[ \frac{\partial u}{\partial t}+(u\cdot\nabla)u\right]=qn(E+u\times B)-\nabla\cdot P - \frac{mn(u-u_{o})}{\tau}. where P is pressure and last term is collision between charged particle and the nutral I was confusing...

Hi. It is supposed that External field imposes to dielectric matter and Polarization occurs. Thus, Bounded volumb and surface charge are made. My question is, is field induced by Bounded charge in addition to original(external) field different from original field existing...

Hi, I'm very interesting about Theoretical physics, In fact, I want to learn about Particle physics for my desire to solve difficulty. But, when I tried to study the famous mathematical book, by afken, I recognized it very hard to study by myself. So, I want to know other book...

Hi, I studied concept of numerical aperture and f number I learned numerical aperture(N.A) is measure of how much light can be entered into the optical system, its mathematical expression is N.A = nsin\theta_m where n is index of refraction of immersing medium surrounding lens and...

Hi, I learned optics with pedrotti optics book. It is suppopsed that light is reflected on surface of first layer and then tranmited wave is also reflected on surface of second layer, So there is Double Layer incident light get there. According to book, If two reflections are...

Hi, I just wander what hapeens if photon which energy is higher than difference of adjacent energy levels collide with atom? How does Excess energy go? transmiting atom by form of photon or giving motional energy to the atom? Second Question is What does process ocurrs when enough...

Hi, It is long time to come here sine i graduate University. Anyway, My question is whether exact form of Group velocity is \frac{dw}{dk} or \frac{dw}{dk}|_{\bar{k}} I want to know whether Group velocity is independent of K, propagation number Becasue Group velocity is 'proper'...

For instance, I have a simple eigen function such as \varphi = Ae^{ik_{1}x} + Be^{-ik_{1}x} This is complex form which means we can't draw this function on real coordinate. How can i draw this function? just By taking out real term of complex function? Second question is what...

Hi, I'm curious about What world it is, What happened to the initial world to become this state. I'm student undergraduate and I got admission from plasma laser lab of graduate school. But i want to learn about String-Theory. So i planed to learn relevant subject step by step. But...

Hi I thought Hamiltonian for two particle system is H = \frac{-\hbar^2}{2m}\frac{\partial}{\partial x_{1}} + \frac{-\hbar^2}{2m}\frac{\partial}{\partial x_{2}} + v(x) But is it right? I just want to know This way is right to construct every hamiltonian of many body system. What i...

Thank you for your help I solved my first question. But How about second and third question? Anyone know about this well? I can't imagine real meaning of the Probability current density!

Hi. I have three question. First is form of normalized momentum egien function Liboff said that of unbounded is \frac{1}{2\pi}exp[ikx] But Why should this form be normalized eigen function of momentum in unbounded? Second question is whether probability density is equall to...

Thank you for your help! I'm very pleased with you. But Could you tell me how to apply chain rule of calculus on that formula? I just subsitute x = \beta\epsilon into the x of dominator to get your formula. is it right procedure? What is more, Can you give me a answer of second question?