I'm not entirely sure this fits under science education, however it is somewhat science related, specifically light science, and I do need to be educated.
Imagine you are outside on a perfectly sunny day with a nice white piece of tagboard (because it's heavier and harder to blow away) and you hold up, for sake of example, a translucent red piece of glass between the light source, in this case the sun, and the tagboard and the sun shines through the piece of glass and creates a duplicate image onto that tagboard, the shape of which alters depending on what angle you hold the glass.
What is that duplicate image called, please? I thought it was refraction, but now I think it is something different and trying to dig around on the internet I am having a hard time finding what describes what I am talking about. I am a photographer who takes pictures of gemstones, my favorite things to play with in photography are lighting and angles and gemstones make the perfect subject for that. I have two different methods of taking pictures of gemstones with light sources. The first is as I described with the red glass above. The second is taking the gem into a dark space and lighting it up with a pen light to create almost an Aurora Borealis type effect, kind of like that scene in Balto with the broken glass. The second method I realize probably is refractions, it's the "light reflection"/duplicate image I wish to know the title to.
Attached are some examples. The first two images are method one that I used in the example with the duplicate image, the third picture is the second method with the pen light. Actually, that one is from my first time doing a shoot like that where I made a black paper cone with a small hole at the tip and taped it over the flash light of my sister's smart phone. Yay, resourcefulness!