Water tank experiment clears up some refraction misconceptions

摘要

Imagine looking at a partially immersed straw in a glass tank containing water. How do you think the straw will look? In most cases, even those with scientific knowledge will answer that the straw will look as if it were broken or/bent at the water's surface. However, the straw will actually appear perfectly intact and straight. This misconception arises from misunderstandings about refraction.