Photography is light. Light hits the subject, travels through a lens and hits a sensor or a piece of film, creating an image. Everything else is just there to assist.
However, light can definitely go the reverse way, with the laws of physics enabling a complete reversed path. Light coming from somewhere near the sensor plate, going through a lens and arriving at a screen or a wall re-building an image.
Come to think about it this is almost magical, yet this is how cinema came to be, and how some of our sweetest memories were created. Click to continue ›