Recent content by e2718281

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    Graduate Radial polarization and optical vortex

    hi, What is the difference between radial polarization and optical vortex? thx http://en.wikipedia.org/wiki/Radial_polarization http://en.wikipedia.org/wiki/Optical_vortex http://en.wikipedia.org/wiki/Angular_momentum_of_light http://en.wikipedia.org/wiki/Orbital_angular_momentum_of_light...
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    Do wooden wall or window glass give good protection from penetrating radiation

    I have used X-ray diffraction for crystalline analysis. I know how to protect the body from radiation in the lab. But I am not specialist in radiation. In Fukushima, residents living within 20km (~13 miles) of the nuclear station must evacuate their homes. But they naturally don't have...
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    Do wooden wall or window glass give good protection from penetrating radiation

    thank you, Astronuc. for example, to decrease the radiation to 1%, how much thickness is necessary? (Most Japanese houses are made ​​of wood...)
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    Do wooden wall or window glass give good protection from penetrating radiation

    Do wooden wall or window glass give good protection from penetrating radiation such as gamma rays?