Based on the conservation of photon momentum component parallel to the interface, the demonstration device of refraction law of light is made.
基于光子动量在不同媒质分界面上沿分界面方向守恒原理，制作了光的折射(定)律演示装置。
Shield material with some certain composition can absorb a large part of low energy photon of X-ray and reduce the radiation effect on electronic component.
采用一定组分的材料对X射线进行辐射屏蔽，可以吸收大部分的低能光子，减少X射线对电子系统的辐射损伤。
Shield material with some certain composition can absorb a large part of low energy photon of X-ray and reduce the radiation effect on electronic component.
采用一定组分的材料对X射线进行辐射屏蔽，可以吸收大部分的低能光子，减少X射线对电子系统的辐射损伤。
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