Compléter game reflection Version en ligne juego de reflexión par Carlos Cristancho 1 because that light straw change dense apparently light example glass which speed substance when you Another notice phenomenon occurs transmitting light is refraction , consists of a of of passing from one medium to another ; This can be air - water - air or air - glass - air . For , if put a straw into a with water , you that the folds . This is passes from a less dense to a one .