Multiple reflections occur in a pair of parallel mirrors.

This mirror illusion is produced when two parallel reflective surfaces consisting of a total reflection mirror and a partially reflecting "oneway mirror" are placed in a parallel arrangement at some distance in front of it, with the necessary light on the Perimeter.

This mirror can reflect an indefinite number of light rays.

Therefore, reflection recedes into the distance, as the light is actually crossing the distance it appears to be traveling and creates the appearance of a tunnel of lights of great depth.