Browsing the catalog of your favorite optics supplier you will find a large variety of prisms used to reflect, invert, rotate, disperse, steer, and collimate light. It is important to point out ...

is the change in direction of a wave at a boundary. When light is refracted as it enters a prism, each colour is refracted by a different amount. Because each colour has a different wavelength ...

The incident ray is refracted towards the normal as it enters the glass prism from air. It is then refracted away from the normal at the boundary between glass and air as it leaves the prism.