Assignment 08 Questions.pdf

Assignment 08 Questions.pdf - BME/ELEC 335 Biosensors and...

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BME/ELEC 335 — Biosensors and Instrumentation Name ___________________ Fall 2014 Assignment 8 (Out of 100%) Due on Friday, 28 November 2014, 8:30 AM on CourseSpaces Std #____________________ Upload your work in a document file to CourseSpaces. The file must be in one of the following formats: PDF, MS Word, or Open Office format. Work submitted in any other file formats will not be graded . 1. [20%] When an x-ray machine is set for a normal film of the abdomen, around 100 kV, the energy distribution of the beam is such that 4% of the beam can penetrate and exit the patient. If we want to see objects 0.5 mm in diameter that can modulate the beam 50%, what level of incident exposure in 𝑅𝑅 is required? What if the size of the object were 0.2 mm and the modulation (contrast) was 10%? 2. [30%] Ultraviolet light is defined as EM waves having wavelengths in the range 4 to 400 nanometers. (a) Determine the frequency range of ultraviolet light. (b) Determine the photon energy range of ultraviolet light.
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