In Paint Shop Pro, transparent overlays are layers you place over JPEG images you want to paint on or edit. Layers are virtual transparencies that make complex but easily editable images possible.

The iron is fixed in place by a layer of carbon, which is already transparent to some wavelengths of X-ray light. One iron sheet is placed at a node and the second at an antinode within the cavity ...

This clever, battery-operated DIY light wedge that you can use as an overlay on your eReader's ... (and a holder for them), a small sheet of transparent plastic (although anything transparent ...

Transparent ... their own light, but they can be seen because they reflect light from luminous objects. The light travels in a straight line directly from the object to your eye. Ray diagrams ...