Rang a 4 did an experiment on refraction. they made an arrow change direction without touching it !!
What was happening ?
Our eyes are using light to see various objects all the time, but when this light travels through different mediums (such as water & air) it changes direction slightly. Light refracts (or bends) when it passes from water to air. The straw looks bent because you are seeing the bottom part through the water and air but the top part through the air only.
Classes involved: Ms Grealish