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。
2
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.