Light Refraction and Total Internal Reflection Light bends, or refracts, as it goes from one transparent material to another (like air to glass) It also totally internally reflects and stays inside of a piece of glass if it hits the edges of the glass at the right angle Understanding and manipulating the refraction and total internal reflection of light is super important for all kinds of scientific systems, like medical devices, telescopes, and microscopes | Fadhel Mahdi