Question

What are the advantages of a totally reflecting prism over a plane mirror?

Answer 1

1. Reflection occurs at one surface only, so no multiple images are formed.
2. Nearly 100% of the light is reflected, compared to about 80% for a silvered glass mirror.
3. There is no silver that tarnishes or wears off.
4. The prism does not bend or distort easily, producing a high-quality image.