You might have wondered why a cheesesteak bag or a pizza box becomes slightly see-through when touched by its greasy contents. To understand why, we need to understand how light interacts with matter.

Cellulose treatment enables creation of optically transparent paper for use a substrate. We cannot see through ordinary paper because it’s constituent micrometer sized cellulose fibers and large ...

Small imperfections in a wine glass or tiny creases in a contact lens can be tricky to make out, even in good light. In almost total darkness, images of such transparent features or objects are nearly ...