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Unformatted text preview: Problem VIII.1 A beam of electrons is sent along the xaxis from ∞ (infinity) with kinetic energy E = 4.2 eV. The beam encounters a potential barrier of height V = 3.2 eV and width 2 a = 1.2 nm. What fraction of the incident beam is reflected? Hints: No hints Solution: No Solution yet Problem VIII.6 Find an expression for the transmission coefficient of a particle with a fixed, finite energy phy251_hw07 file:///C/DOCUME~1/PHY_CO~1/PHY251/PHY251_hw07.HTML (1 of 2) [3/28/2001 1:00:21 PM] approaching a barrier in the limiting case as V →∞ and a → 0 such that aV is a constant. What is  R  2 ? Hints: You can simplify your algebra by defining a parameter λ ≡ k 2 a 2 . Solution: No Solution yet phy251_hw07 file:///C/DOCUME~1/PHY_CO~1/PHY251/PHY251_hw07.HTML (2 of 2) [3/28/2001 1:00:21 PM]...
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This homework help was uploaded on 02/05/2008 for the course PHY 251 taught by Professor Rijssenbeek during the Spring '01 term at SUNY Stony Brook.
 Spring '01
 Rijssenbeek
 Physics, Work

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