Unformatted text preview: excited state n = 4, w hat is the w hat is the w avelength of absorbed light for this transition? Is it in the visible range? Can you say anything about the color of the dye molecule from this piece of information? (d) Indicate how you w ill calculate the net charge w ithin the region 0 < x < 0.2 nm, assuming all these electrons are in their ground states. Do not do the actual calculation. 3. An electron w ave travelling in the positive x-direction is incident on the rectangular potential barrier show n: (a) Write (do not solve) the Schrödinger’ s equation in the three regions. (b) What is the nature of the solution (travelling w ave, standing w ave, decaying w ave) in the three regions? (c) Neglecting reflection at x = W, solve the equation in region II and show that [ R (W) / R ((0)] = exp -(14.5). (d) Using the result of (c), calculate the tunnel transmission probability [ R (W) / R ((0)] . 2...
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