By Herman Cember, Thomas E. Johnson
A dynamic, all-inclusive review of the sphere of wellbeing and fitness physics A Doody's middle identify! If it really is a big subject within the box of future health physics, you can find it during this depended on textual content . . . in sections on actual rules, atomic and nuclear constitution, radioactivity, organic results of radiation, and instrumentation. This distinctive consultant spans the full scope of the sector and gives a problem-solving strategy that may serve you all through your profession. good points: an intensive assessment of need-to-know subject matters, from a assessment of actual ideas to an invaluable examine the interplay of radiation with subject greater than 380 "Homework difficulties" and one hundred seventy five+ "Example difficulties" crucial heritage fabric on quantitative possibility review for radiation publicity Authoritative radiation security and environmental overall healthiness insurance that helps the overseas fee on Radiological Protection's criteria for particular populations High-yield appendices to extend your comprehension of bankruptcy fabric NEW! crucial insurance of non-ionizing radiation, lasers and microwaves, computing device use in dose calculation, and dose restrict suggestions (20081105)
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Additional info for Introduction to Health Physics: Fourth Edition
54) Since B has dimensions of Wb/m2 and μ0 has dimensions of Wb/(A · m), the dimensions of magnetic ﬁeld strength, H, are A/m. In any medium other than air, the magnetic ﬂux density is equal to the product of the magnetic ﬁeld strength H and the magnetic permeability of that medium, μ. Safety standards for magnetic ﬁeld strength are listed in terms of amperes per meter. 4 A/m. ε c ε H Ho Figure 2-16. Schematic representation of an electromagnetic wave. The electric intensity ε and the magnetic intensity H are at right angles to each other, and the two are mutually perpendicular to the direction of propagation of the wave.
One ˚ nm represents 1 × 10−9 m, which is equal to 10 A. It may seem strange that having found the wave theory of electromagnetic radiation inadequate to explain certain observed physical phenomena we should incorporate part of the wave model into the quantum model of electromagnetic radiation. This dualism, however, seems to be inherent in the “explanations” of atomic and nuclear physics. Mass and energy—particle and wave, in the case of electromagnetic energy—and, as will be shown below, wave and particle in the case of subatomic particles, all are part of a dualism in nature; either aspect of this dualism can be demonstrated in the laboratory by appropriate experiments.
This dualism, however, seems to be inherent in the “explanations” of atomic and nuclear physics. Mass and energy—particle and wave, in the case of electromagnetic energy—and, as will be shown below, wave and particle in the case of subatomic particles, all are part of a dualism in nature; either aspect of this dualism can be demonstrated in the laboratory by appropriate experiments. If the experiment is designed to recognize a particle, a particle will be found. If, on the other hand, an experiment is designed to recognize radiation from the same source as waves, the results show that the same radiation that had been previously identiﬁed as being particulate in nature is now a wave!
Introduction to Health Physics: Fourth Edition by Herman Cember, Thomas E. Johnson