ENGR 132—Spring 2015 Answer Sheet Problem Set 01 Answer Sheet Name: Purdue Login: Section Number: EMERALDA FONG fonge 001 Problem 1: Basic MATLAB Script and Plot A: Page 1 of 3 ENGR 132—Spring 2015 Answer Sheet B: 1. The number of doctorate degrees earned in 2008 in the U.S is 24231.5 2. The number of doctorate degrees earned in 2006 in South Korea and Taiwan is 4872.5 C: Because there are not enough data to calculate the number of degrees for 2013 since the maximum year given was only until 2009. Problem 2: Band Gap Energy A: 1. The energy is 2.6885 eV when frequency is 6.5*10^14 Hz 2. The energy is 2.0680 eV when wavelength is 6*10^-7 m B: 1. Violet 3.1021 Blue 2.6123 Green 2.4330 Yellow 2.1769 Orange 2.1031 Red 1.9090 Page 2 of 3 ENGR 132—Spring 2015 Answer Sheet 2. C: Predicted band gap energy The band gap energy of the semiconducting material in the bulk is 1.5 eV Percent difference There is a difference of 28% as the known band gap energy of silicon is 1.17 eV but the calculated one was 1.5 eV. This is because the material’s dielectric constant (dimensionless) given was just a given value to calculate the estimation. Page 3 of 3

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