Modern Physics For Scientists And Engineers
Modern Physics For Scientists And Engineers
2nd Edition
ISBN: 9781938787751
Author: Taylor, John R. (john Robert), Zafiratos, Chris D., Dubson, Michael Andrew
Publisher: University Science Books,
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Chapter 4, Problem 4.25P
To determine

The predicted shift of wavelength and the percent shift in the wavelength.

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4.13 Photodiode in photoconductive mode. A photodiode is connected in reverse mode with a small reverse voltage to ensure low reverse current. The leakage current is 40 nA and the sensor operates at 20°C. The junction has an area of 500 um? and operates from a 3 V source, as shown in Figure 4.31. The resistor is 240 S2. Calculate the voltage across R in the dark and when illuminated with a red laser beam (800 nm) with power density of 5 mW/cm². Assume a quantum efficiency of 50%.
The half value layer (HVL) of a material is defined as the thickness of the material needed to reduce the intensity of the incident x-ray beam to half its value. Assume that the x-ray beam is monochromatic, no scattering occurs and that material A (as shown in Figure 1) is. homogeneous and has a linear attenuation coefficient (u.). Material A has an HVL of 1.5 mm. Calculate the ratio l/lz as shown in Figure 1 if x-5 mm. lo HA=?? 2x Figure 1: Schematic diagram fr question 3.
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