Question

What is a totally reflecting prism ?

Answer 1

• Prism: A prism is a solid figure whose bases have the same size and shape and are parallel to one another, and each of its sides is a parallelogram.
• A prism having one of the angles as $90°$ between two refracting surfaces and the other two angles as $45°$ is called a total reflecting prism, because the light rays that are incident normally on any of its faces, will suffer total internal reflection inside the prism.