Recent content by learner@123

Hello friends. My question consists two parts, 1-What is the difference between an optical and an acoustic phonon? 1-What are the conditions by which we can decide the type of phonon i.e optical or acoustic phonon ? Hope to get the reply soon.

That's true ,but very small leakage current flows at high field ratings (KV/mm) .For that i want effective mass.

Is there any average value defined for polyethylene .

Hello friends Can anyone tell me the effective mass of electron in polyethylene and how it depends on the crystalline nature of polymer.

thank you sir for ur quick reply ...now i understood sir...but sir if the particle is not coming from infinity then what will be the situation on trapping

Sir you got my problem exactly as i was thinking but still if suppose there are certain energy levels just below vacuum level then Is it possible for electron to loose its kinetic energy to go into lower energy level .How energy conservation law holds

Sir can you suggest any literature regarding that logic it will be good for me ...

Sir actually I mentioned that electron is at vacuum level hence its PE will be zero but it will have some KE.

Thanks for ur positive response Actually sir i have confusion on trap condition and scattering condition for electron in finite potential well. In given section 2.6 author discussed two different cases (1)when total energy E is negative i.e trapping condition (2)when total energy E is positive...

Hello everyone I am searching for the answer for the condition (related to the total energy of the particle E) for which any particle will go into the square potential well. I have studied Griffiths's quantum mechanics book Introduction to the quantum mechanics Section 2.5 and 2.6) but still...