How many times will the intensity of a narrow X-ray beam of wavelength 20 pm decrease after

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How many times will the intensity of a narrow X-ray beam of wavelength 20 pm decrease after passing through a lead plate of thickness d = 1.0 mm if the mass absorption coefficient for the given radiation wavelength is equal to μ/p = 3.6 cm2/g?
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College Physics

ISBN: 978-0495113690

7th Edition

Authors: Raymond A. Serway, Jerry S. Faughn, Chris Vuille, Charles A. Bennett

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