Refraction Lab

For refraction lab we put a ruler inside a cup of water. Inside the water the ruler looked bent. The ruler looked as if it were broken. We then put it in the oil AND the water. It looked as if it had two cracks. Since the oil was lighter it went to the very top. The ruler looked larger or magnified in the oli than the water. Refraction means when light bends as it passes from one object to another object because it changes speed.