Refraction of light
Refraction (Refraction) caused by the light moves through a medium with different density as a result, the direction of the light change. At which point the light refraction occurs, it will cause reflection of light up simultaneously.
As shown.
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![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)