Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 30, Problem 25P
(a)
To determine
The angle of the
(b)
To determine
The distance of radiation.
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Consider a bright star in our night sky. Assume its distance from Earth is 82.9 light-years (ly) and its power output is 4.00 x 1028 w, about 100 times that of the Sun.
(a) Find the intensity of the starlight at the Earth.
|nw/m²
(b) Find the power of the starlight the Earth intercepts. One light-year is the distance traveled by the light through a vacuum in one year. (The radius of Earth is 6.37 x 106 m.)
MW
The electric field intensity of a linearly polarized plane wave propagating
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1 and σ = 4). (a) Determine the attenuation constant, Phase constant,
o
intrinsic impedance Phase velocity/wavelength and skin depth (b) Find
the distance at which the amplitude of E Is 1/8 its value at z=0 (c) Write
the expression for E(z,t) and H(z,t) at Z=0.4 m as functions of t
Operation of the pulse oximeter (see previous problem).The transmission of light energy as it passes througha solution of light - absorbing molecules is described by theBeer–Lambert law
I = I010-εCL or log10 (I/I0) = -εCL
which gives the decrease in intensity I in terms of the distance Lthe light has traveled through a fluid with a concentration Cof the light - absorbing molecule. The quantity ε is called theextinction coefficient, and its value depends on the frequencyof the light. (It has units of m2/mol.) Assume the extinctioncoefficient for 660 - nm light passing through a solutionof oxygenated hemoglobin is identical to the coefficient for940 - nm light passing through deoxygenated hemoglobin.Also assume 940 - nm light has zero absorption (ε = 0) inoxygenated hemoglobin and 660 - nm light has zero absorptionin deoxygenated hemoglobin. If 33% of the energy ofthe red source and 76% of the infrared energy is transmittedthrough the blood, what is the fraction of hemoglobin that…
Chapter 30 Solutions
Physics for Scientists and Engineers
Ch. 30 - Prob. 1PCh. 30 - Prob. 2PCh. 30 - Prob. 3PCh. 30 - Prob. 4PCh. 30 - Prob. 5PCh. 30 - Prob. 6PCh. 30 - Prob. 7PCh. 30 - Prob. 8PCh. 30 - Prob. 9PCh. 30 - Prob. 10P
Ch. 30 - Prob. 11PCh. 30 - Prob. 12PCh. 30 - Prob. 13PCh. 30 - Prob. 14PCh. 30 - Prob. 15PCh. 30 - Prob. 16PCh. 30 - Prob. 17PCh. 30 - Prob. 18PCh. 30 - Prob. 19PCh. 30 - Prob. 20PCh. 30 - Prob. 21PCh. 30 - Prob. 22PCh. 30 - Prob. 23PCh. 30 - Prob. 24PCh. 30 - Prob. 25PCh. 30 - Prob. 26PCh. 30 - Prob. 27PCh. 30 - Prob. 28PCh. 30 - Prob. 29PCh. 30 - Prob. 30PCh. 30 - Prob. 31PCh. 30 - Prob. 32PCh. 30 - Prob. 33PCh. 30 - Prob. 34PCh. 30 - Prob. 35PCh. 30 - Prob. 36PCh. 30 - Prob. 37PCh. 30 - Prob. 38PCh. 30 - Prob. 39PCh. 30 - Prob. 40PCh. 30 - Prob. 41PCh. 30 - Prob. 42PCh. 30 - Prob. 43PCh. 30 - Prob. 44PCh. 30 - Prob. 45PCh. 30 - Prob. 46PCh. 30 - Prob. 47PCh. 30 - Prob. 48PCh. 30 - Prob. 49PCh. 30 - Prob. 50PCh. 30 - Prob. 51PCh. 30 - Prob. 52PCh. 30 - Prob. 53PCh. 30 - Prob. 54PCh. 30 - Prob. 55PCh. 30 - Prob. 56PCh. 30 - Prob. 57PCh. 30 - Prob. 58PCh. 30 - Prob. 59P
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