Question

name some various optical devices works by depending on refraction​

Answer 1

There are two basic types of telescopes: reflecting telescopes and refracting telescopes. The two typesare compared in the Figure below. They differ in how they collect light, but both use convex lenses to form enlarged images.The instruments which are used in optics are optical instruments. Thus, the optical instruments are the devices which are used in various purposes likemicroscope, telescopes, lens, magnifying lens, mirror,astronomical telescope, glass etc.