One of the mirrors is half-silvered so that it can reflect, but also let light out for your eyes to see. The LED images dim with each reflection since some light can escape from one of the mirrors.

To investigate the reflection of light by a plane mirror.

To investigate the reflection of light by different types of surface, and the refraction of light by different substances. Remove the block. Join the crosses to show the paths of the light rays ...

It all started as a visual experiment ... and held the mirror up in front of the lens, directly in the middle of the frame. The squarish mirror captured the Hudson Yards in the reflection.