Video Transcript
(5.8s) Prisms are useful for folding optical systems or rotating images. Each prism type has a specific angle that the light path bends. Prisms can be used to invert and revert images depending on the application. SLR cameras and binoculars both use prisms to make sure that the image you see is at the same orientation as the object. One important thing to keep in mind when selecting a prism is that the beam reflects off multiple surfaces within the optics. This means the optical path length through the prism is much longer than it would be with a mirror. (7.0s)
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