#1
1st November 2015, 09:28 AM
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IIT Guwahati Notes
I am doing B.Tech First Semester from IIT Guwahati. I need notes of Chemistry (CH-101) Subject of First Semester. So will you please provide notes for B.Tech First Semester subject?
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#2
1st November 2015, 11:54 AM
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Re: IIT Guwahati Notes
As you want notes of Chemistry (CH-101) Subject of B.Tech First Semester Program of IIT Guwahati, so here I want to tell you that we have notes of following topics: Blackbody Radiation Postulates of Q.M Tunneling of Electron Vibrational Motion Spectroscopic Transitions VBT & MOT Spectroscopy Schroringer Wave Equation Hydrogenic Atoms 2 Born-Oppenheimer Hydrogenic Atoms Notes of Tunneling of Electron Tunnelling of electrons across a barrier: Consider an electron (particle-wave) located at the left side of the barrier. The barrier is a potential energy barrier. At the left of the barrier, the potential energy of the electron is zero (0). At the right of the barrier the potential energy of the electron is also zero (0). However, the barrier has a height of V (potential energy) which is much larger than the energy of the electron E; i.e. at the barrier E<V. We need to find the wavefunction of the particle before the barrier, at the barrier and after the barrier. Then we will calculate the transmission coefficient (probability). This would be a function of the width of the barrier (L). Quantum mechanics considers electrons to have both wave and particle like properties. Tunneling is an effect of the wavelike nature of electron. An important an interesting application of this nature of electron is the design and operation of scanning tunnelling microscope (STM). In STM a tip is scanned across the sample surface and the tunnelling current is related to the separation between the tip and the sample surface. Thus from the current one can measure the distance and surface profile of a conducting surface. Shown below is a typical geometry of the metallic tip and conducting surface that is used in STM. One scans the surface across its length and breadth and thus measures the surface profile from the tunnelling current. Notes of Tunneling of Electron |