For this photo challenge, show us what “refraction” means to you.
Refraction is essentially a surface phenomenon for example a change in direction of a wave due to a change in its transmission medium. In physics term, the change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different.
These photos are of Kuching, my hometown by night. Looks like lightning on the sky. Credits to facebook friends. I am not the photographer of these shots.