Considerations Regarding the Unintended Radiation Exposure by Charles B. Meinhold PDF

By Charles B. Meinhold

ISBN-10: 0929600363

ISBN-13: 9780929600369

ISBN-10: 1435630777

ISBN-13: 9781435630772

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Additional info for Considerations Regarding the Unintended Radiation Exposure of the Embryo, Fetus, or Nursing Child (Ncrp Commentary)

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The result is that medium seems becoming a convex or concave mirror so that parallel light is focused or defocused. This is just the processes of self-focusing and selfdefocusing of lights. 7. Parallel light is focused at point O . Then it becomes a thin beam of light projecting out medium. We compare it with common focusing process shown in Fig. 6. 7. But it dose not do actually. So the selffocusing process is irreversible. And so do for the self-defocusing process of light. Fig. 6. Focusing process of light.

But if the electron at high-energy level transits back to low-energy level, it either gives out only a photon at frequency 3  1  2 , or two photons at frequencies 1  1 , 2  2 in general. It will not produce two photons with original frequencies 1 and 2 . Double photon absorption process is irreversible. And so is for multi-photon absorption. 5 Photon echo phenomena [6] Under certain temperature and magnetic field condition, a beam of laser can be split into two lights with a time difference by using a time regulator of optics.

Fig. 7. Self-focusing process of light. 4 Double and multi-photon absorption [5] In double absorption process of photons, an electron in low-energy level will absorb two photons with frequencies 1 and 2 , then transits to high-energy level. But if the electron at high-energy level transits back to low-energy level, it either gives out only a photon at frequency 3  1  2 , or two photons at frequencies 1  1 , 2  2 in general. It will not produce two photons with original frequencies 1 and 2 .

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Considerations Regarding the Unintended Radiation Exposure of the Embryo, Fetus, or Nursing Child (Ncrp Commentary) by Charles B. Meinhold


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