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A free electron is described by the wave function: Using the linear momentum operator, derive an expression for the mo...
Question 21 Consider a free electron in one dimension (i.e. an electron free to move along say the x-direction on (a) The time-independent Schrödinger equation is Αψη (x)-Εηψη (x), where is the Hamiltonian (total energy) operator, and ψη (x) are the electron wave functions associated with energies En Assuming the electron's energy entirely comprises kinetic energy (as it is 'free' there is no potential energy term), write down the Schrödinger equation given that the momentum operator in one- dimension is...
4-9. The momentum operator in two dimensions is Using the wave function given in Problem 4–8, calculate the value of (p) and then 0 =(pº) - (p)? Compare your result with o2 in the one-dimensional case.
(i) Given that angular momentum of an electron in a hydrogen atom is = ??? , where m is the electron mass, v is its velocity and r is the radius of orbit, use the de Broglie relation to derive a relation to prove the angular momentum of the electron is quantized. Note: You may assume integer multiples of half-wavelengths are required. [8 marks] (ii) Using the relation derived in part (i), derive an expression for the energy of an...
lsa(1) lsB(1) 1Isa(2) 1sja 7. Consider this two-electron wave function: ψ-C Write the expression for ψ that comes from expanding the determinant. Find the normalization constant, C. The 1s orbitals are orthonormal, and so are the spin orbitals. a) b) Using your answer from (a), show that the wave function factors into a spin part and a spatial part. Hint: It may help to rewrite each spin orbit so its spatial and spin factors are clearer. For instance, rewrite Isa...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...